Recently, when trying to use RDC to connect to another PC, it will not accept my password. However, when going to the PC, the password I try is correct. This is happening from any PC I use to try to connect to the PC in question. I get to the connect window just fine, but after entering the Username and Password, I receive the message that the credentials are in error. The PC I am trying to connect to is running Vista and the others run either Vista or XP. I have successfully used PDC prior to this problem on all PCs.
What should I do to rectify this problem?