This is hopefully a simple question. I'm trying to connect to a remote share from Windows 7. The first time I went to connect, I accidentally specified the wrong username. Now, whenever I try to connect to that share, it won't let me specify another username. There is only one tile in the authentication dialog and it's pre-filled with the username I entered incorrectly. A reboot has not fixed the problem.
Note that this only seems to affect Windows Explorer. I can connect properly using NET USE on the command line, where I can specify the username explicitly as a command line parameter.