Unable To Accessing Network Shares

I have a fle server that I recently replaced with a new machine. The name of the new machine is the same as that of the old, and the names of the shares in it are also the same. Since the upgrade my Vista machine is unable to access the shares and gives me this error: "The parameter is incorrect". This occurrs when trying to open mapped drives as well as trying to access the server's root UNC path. After seeing this error I tried the "net view" command from DOS and got this: C:>net view \x6 ,System error 87 has occurred. The parameter is incorrect.

I've found a way to temporarily fix the problem, but after I reboot my Vista box it happens again and I need to apply the fix again. The fix is to use "net use" like this: C:>net use \x6software /user:xxxusername The command completed successfully. Note that if I use my actual domain name this command fails, but if I put in an invalid one (like "xxx") then it succeeds. Yes, I know that's very strange. I was lucky to find this by mistyping my domain name once and was surprised that the command then worked. After issuing this command I can
access the file server just fine and my mapped network drives work fine as well.So, does anyone know how I can fix this permanently?