[Samba] can't un-mount

[K J]

here's how i mounted a shared folder:
#mount -t smbfs -o
username=me,password=psw,workgoupt=kppo 
//har-file2/new-gp  /samba/k-drive


and when trying to un-mount using

umount /samba/k-drive   or,
smbumount /samba/k-drive

I get this message:
'device is resource busy'

Any idea why i can' unmount this?

please reply to all, thanks!

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