GalwayGirl Which programm you're using and where did you try to change password. For all programms except Webmail, the password must be changed in MySwisscom, here you can also check your e-mail adress, of course. The password then is valid for all device where you installed Bluewin mail.

For webmaIl the password must be changed here (under Login Methods, but here you change also the password for MySwisscom itself and Blue TV, etc)
Login & Security - My Swisscom