Samba Problem, Network Card Busy after connecting w/XP Options

[V-Man]

I have a minor problem. I have my 5500 (ROM 3.10) set up for wireless sync with WinXP. Everything works well except when I connect to the Z over a WiFi network connection. After I am done with the Z, I cannot shutdown the network card without logging off of the XP computer. I think that XP is sending somesort of "keep alive" through the WiFi card. I have to either log off or shut down the Windows computer. After shutting it down, I can shutdown the network connection and then eject the network card from the Z. I have not gotten around to trying my Z with my home network (Linux and Win98/XP computers) to see if the problem is just windows or also happens with linux also.

Has anyone else ever had a similiar problem? If so, how did you fix it?
Does anyone have any ideas what is actually happening?

As I said earlier, this is more of an annoyance rather than a major problem. I would just like my Z to work "perfectly". I can post the changes I made to the system files in order to get WiFi syncing working if needed.

Thanks
V-Man