May I ask one question about samba~~!

[saxon]

Dear all:

    hi,everybody,I need a help,would u please give a kindly advise? I have to ported the samba 2.0.6 to my board(cpu:mips,os:linux 2.6),and when I start it, I found a strange thing: in my host(win xp),click menu start -> run, input the command  "\\192.168.10.150\usb" to visit my board , it's ok. but if input "\\192.168.10.150",a warning box poping up,it says: can't find the net path. 
    what's more in winxp "net neibordhood",I can see the board,but just can't doubclick the my host icon to enter.
    thank you  very much!
    
    my smb.conf as follow:
[global]
        workgroup = MSHOME
        netbios name = AYECOMHOST
        netbios aliases = 
        server string = ayecomhost
        interfaces = 
        bind interfaces only = No
        security = SHARE
        encrypt passwords = No
        update encrypted = No
        allow trusted domains = Yes
        hosts equiv = 
        min passwd length = 5
        map to guest = Never
        null passwords = No
        password server = None
        smb passwd file = /var/private/smbpasswd
        root directory = /
        passwd program = ./bin/passwd
        passwd chat = *new*password* %n\n *new*password* %n\n *changed*
        passwd chat debug = No
        username map = 
        password level = 0
        username level = 0
        unix password sync = No
        restrict anonymous = No
        use rhosts = No
        log level = 2
        syslog = 1
        syslog only = No
        log file = /var/log.smb
        max log size = 1
        timestamp logs = Yes
        debug hires timestamp = No
        debug pid = No
        debug uid = No
        protocol = NT1
        read bmpx = No
        read raw = Yes
        write raw = Yes
        nt smb support = Yes
        nt pipe support = Yes
        nt acl support = Yes
        announce version = 4.2
        announce as = NT
        max mux = 50
        max xmit = 65535
        name resolve order = lmhosts host wins bcast
        max packet = 65535
        max ttl = 259200
        max wins ttl = 518400
        min wins ttl = 21600
        time server = No
        change notify timeout = 60
        deadtime = 0
        getwd cache = Yes
        keepalive = 300
        lpq cache time = 10
        max disk size = 0
        max open files = 10000
        read prediction = No
        read size = 16384
        shared mem size = 1048576
        socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
        stat cache size = 50
        load printers = No
        printcap name = /etc/printcap
        printer driver file = ./lib/printers.def
        strip dot = No
        character set = 
        mangled stack = 50
        coding system = 
        client code page = 850
        stat cache = Yes
        domain groups = 
        domain admin group = 
        domain guest group = 
        domain admin users = 
        domain guest users = 
        machine password timeout = 604800
        add user script = 
        delete user script = 
        logon script = 
        logon path = \\%N\%U\profile
        logon drive = 
        logon home = \\%N\%U
        domain logons = No
        os level = 20
        lm announce = Auto
        lm interval = 60
        preferred master = No
        local master = Yes
        domain master = No
        browse list = Yes
        dns proxy = No
        wins proxy = No
        wins server = 
        wins support = No
        wins hook = 
        kernel oplocks = Yes
        ole locking compatibility = Yes
        oplock break wait time = 10
        smbrun = ./bin/smbrun
        config file = 
        preload = 
        lock dir = /var/locks
        default service = 
        message command = 
        dfree command = 
        valid chars = 
        remote announce = 
        remote browse sync = 
        socket address = 0.0.0.0
        homedir map = 
        time offset = 0
        unix realname = No
        NIS homedir = No
        panic action = 
        comment = 
        path = 
        alternate permissions = No
        revalidate = No
        username = 
        guest account = admin
        invalid users = 
        valid users = 
        admin users = 
        read list = 
        write list = 
        force user = 
        force group = 
        read only = Yes
        create mask = 0744
        force create mode = 00
        security mask = -1
        force security mode = -1
        directory mask = 0755
        force directory mode = 00
        directory security mask = -1
        force directory security mode = -1
        guest only = No
        guest ok = Yes
        only user = No
        hosts allow = 
        hosts deny = 
        status = Yes
        max connections = 0
        min print space = 0
        strict sync = No
        sync always = No
        print ok = No
        postscript = No
        printing = bsd
        print command = lpr -r -P%p %s
        lpq command = lpq -P%p
        lprm command = lprm -P%p %j
        lppause command = 
        lpresume command = 
        queuepause command = 
        queueresume command = 
        printer name = 
        printer driver = NULL
        printer driver location = 
        default case = lower
        case sensitive = No
        preserve case = Yes
        short preserve case = Yes
        mangle case = No
        mangling char = ~
        hide dot files = Yes
        delete veto files = No
        veto files = 
        hide files = 
        veto oplock files = 
        map system = No
        map hidden = No
        map archive = Yes
        mangled names = Yes
        mangled map = 
        browseable = Yes
        blocking locks = Yes
        fake oplocks = No
        locking = Yes
        oplocks = Yes
        level2 oplocks = No
        oplock contention limit = 2
        strict locking = No
        share modes = Yes
        copy = 
        include = 
        exec = 
        preexec close = No
        postexec = 
        root preexec = 
        root preexec close = No
        root postexec = 
        available = Yes
        volume = 
        fstype = NTFS
        set directory = No
        wide links = Yes
        follow symlinks = Yes
        dont descend = 
        magic script = 
        magic output = 
        delete readonly = No
        dos filetimes = No
        dos filetime resolution = No
        fake directory create times = No

[usb]
        comment = share
        path = /mnt
        valid users = admin
        read only = No