Dell Dim2400 - Can't Access My Documents After Wireless Router Replaced

I have a Dell Dim2400 computer with Pentium 4, Windows XP Service Pack 3, which I purchased surplus from work, where documents were saved on both the computer and a networked server. Once home, "My Documents" could be opened until the wireless router was changed from a D-Link WBR-1310 to a Belkin Play N600. Thereafter, "My Documents" would not open and instead a window labeled "My Documents" opens with the message: "The network folder,\...........My Documents, that contains My Documents is not available. Try again later, or contact your system administrator for further assistance." A rare coincidence or is there some causal relationship?