Inconsistent connections to mapped XP shares?

I have a desktop PC at work running XP, with a share on the My Documents directory that is accessed by my personal Win2K notebook. XP is connected to a domain, Win2K isn't.

I created a persistent mapped connection in Win2K, but it is inconsistent. Some mornings I will come in, boot my notebook and it will connect to the share. Other times it tells me that the share is unavailable and I'm working offline. Nothing I try will force the connection, even when browsing the network or searching for my desktop via Find Computers.

I am running ZA on both my notebook and my desktop, and I did install ZA on my desktop after creating the share, but I have been able to connect since, so I don't think that's the problem. To rule it out, I tried to telnet from my notebook to the netbios ports on my desktop, and was able to create a TCP/IP connection (verified it by running netstat on the desktop), so I know the firewall isn't blocking any connections.

To rule out my notebook as the culprit, I tried mapping a share on an NT server we use for a small intranet application, and the mapping worked fine, so I don't think the problem is with my setup in 2K.

So everything is pointing to XP as being the issue... I'm tech savvy, but new to XP so don't know if there are any quirks or settings I should check.

Has anyone run into this before? Anyone have any ideas or advice to try and work this out?

Any assistance is appreciated...!

Cheers,

KV