Lose mapped drives behind wireless router

I am using a Windows Server 2000 environment, and all the drives map fine when I am plugged into the switch. However, I also have a linksys wireless router that I use to get access to the server (which is on the other side of the router). Sometimes (not always), it losses my mapped drive connections through the wireless router. I can find them again if I plug directly into the switch. Any ideas on how to fix this problem?

Thanks

Matt Perry