I am not sure but did you check and make sure that the Windows PC has it sharing activated so that you can connect to it. Also make sure that the Windows PC is up and running and not sleeping "hibernating". I know I can't access the other computers on our home network if they are sleeping.
I hope this helps.
Thanks Mark, but that's not it. I can connect from the Windows PC to my Mac and view all my files.
I believe the problem is a UNIX one and has to do with the fact somewhere a file became corrupted or deleted, namely the target of the alias. The fact that the SMB security dialoge opens probably has more to do with the alias itself but at this point I'm just guessing.
I really need a UNIX geek to help me out here. I think. :-)
I experienced the same problems with a lot of frustration with my home network. I can connect to my Mac from my PC, but I would get the same error message when trying to connect to the PC share icon in Finder, even after entering a username and password.
If running XP Pro on the PC, make sure your XP account requires a password login. If it boots straight in XP, meaning you have only one account with no password, you won't be able to map from the Mac. If running XP Home, it's not an issue.
As soon as I put in a password on my XP Pro account, then I could connect from the Mac, entering the same username/password. Also make sure both Mac and PC are configured for the same workgroup name, seems to make a difference.
If you already know all of this stuff and tried, sorry, just trying to help.