hussam wroteAlright. I installed firebug but I have absolutely no idea how to use it.
Very Easy, now in FF from bottomleft side u should have icon of bug, or maybe it from top-left side depend of FF version :)
pres on it once, after u open page with cabinet. when u press bug button u will see panel with some tabs, find the tab NET and activate it. refresh page, u will see all requests, dont input login/password, press button clear (Clean), all requiest will be removed from list. after that type login pass and press login. u will see requests again. find there request POST
https://customer.visp.net.lb/_cabinet/chkpwd/processor
open and find subtab 'Responde' if there something copy it to me to PM, and copy subtab Post(parameters)
that it. and tel me in PM from which login u try to login.
all data copy to PM :)