samba 2.32 question

[MSN]

Mr./Ms. samba:
    I'm so excite that now I can access NTFS with Samba.
And I also got a trouble when I transfer a file bigger than 1.98G 
via Ftp or HTTP From WinXP NTFS File System. But I can copy it via 
Windows Explorer without problem. I tried version 3.43, and it still
have this problem.
OS:            Ubuntu Linux 8.04.1 server & WinXP SP3
File System:   Ext2 & NTFS



Thanks for your time,
I am looking forward to your reply.