Clearing Mac's memory of Windows network

I really need your help here... I am so lost.

I redid my linux server and now when I try to access it's Samba share (Windows networking share), my macbook pro is still trying to use the old info somehow. I get prompted for my Workgroup, Username/pass, but it ends up returning error "The alias "void" could not be opened, because the original item cannot be found." [Delete Alias] [Fix Alias] [OK] (Any option is futile, I apparently "have no rights" to delete it despite being the admin). The Workgroup in the login prompt is still the old "Mdkgroup" instead of the new "Workgroup" ...

Any ideas?

Thanks in advance...