Error connecting to Windows Shared Drives

Everything worked fine for a while. No idea what changed. But....
I can connect to my home network fine. Can "see" the server and even all it's shared drives. I can click on the C: drive and navigate around. However - all of the shared external drives are no longer available. I can see them - but when i click to connect i get this:

The operation can’t be completed because the original item for “xxxx” can’t be found.

XXX being the shared name of any of the drives. THe shared drives are where we keep all our videos of son, our ITunes Library, etc... so kind of important that i get to them again. Not sure if maybe one of the updates on Mac OS did this. But is strange that i can see them all, navigate on the c drive - but not the external ones.

FYI - server is Windows 7, i am running 10.7.3

Thoughts?? Thanks.