HD camera won't connect to system

Has anyone had the problem i'm having???

When trying to install the hd camera, it keeps saying that I am putting in the wrong password. (BTW I am putting in the correct password). I have tried two different cameras with no success. Simplisafe is sending out a third camera for me to try. I don't know why it keeps rejecting my password??? I have worked with three different customer service reps, and they can't explain why I can't connect the camera to the system.

Anyone???