How do I change my password in Dial Up Connection? When I type in the new one I check “Remember Password” but when I next want to connect the old password comes back up. No great tragedy but annoying as hell. 
This might help:
http://support.microsoft.com/default.aspx?scid=KB;en-us;q148925
remember password means it will remember it for the next time, not that it will change it