login via different computer impossible

maem / 2015-05-01 08:04:49   

dear forum,
i've had this issue several times: login via my antique desktop-computer (mac os x version 10.5.8) works fine. but when i try to login via my laptop (mac os x version 10.7.5) it's not possible. it's always "wrong password/wrong username", and after several times i have to reset the whole thing.

i checked upper/lower case, regional settings, i tryed different browsers, and i am using a standard keyboard.
if someone can tell the answer to this issue i would be very pleased.
THANK YOU.
maem

This thread has been closed, thank you.