IMac cannot connect to network MyBookWorld

I just moved the location of my modem and wireless router to support the layout of the house overall. This included my MyBookWorld that is attached to the router. Prior to doing so, i accessed these files from a Windows PC in the office and my wifes iMac. After the move, the windows Pc sees it fine, but the iMac sees it there but cannot connect. I am on Lion. Trying to figure out whats different and why it worked before, then upon resetting these devices, it does not. Any thoughts? Thanks.

You may try resetting the MBW, by holding its reset button for 20 seconds.  Also check that is updated to its latest firmware.

What happens when you try to map it on the Mac?