Blog-Stats, can’t log in

This is driving me crazy. Every time I want to check the stats via the Blog Stats plug-in, I’m asked to login, but I can’t! I get an error message that I’ve entered an incorrect password. I’ve tried asking for a new password, but it doesn’t send me the email. Is this because I have blogs with different usernames??
It worked for several days but now I can’t login to check the stats on any of the blogs I have the plug-in on.
Any thoughts? Any suggestions?