Cannot access shared folder on network using TP-Link wireless adapter

I have a domain controller for 20 LAN PCs using Windows XP, and, on it, a shared folder accessible through \\192.168.0.12\myfolder. LAN IP ranges from 192.168.0.100 - 120Next, I have a Cisco Linksys router configured using IP 192.168.1.1, DHCP enabled.

Now I have 5 PCs with TP-Link wireless network adapter installed and connected using my router's connection, and getting IP addresses from the router. Problem is I cannot access my shared folder when I enter \\192.168.0.12\myfolder.

I disabled the firewall and anti-virus on the PC and it connects, but keeps disconnecting every 3 minutes or so with a Windows cannot access \\Myfolder... etc., etc. No network path was found with an Error Code 0x80004005: Unspecified error.