I haven't check the "stay logged in"... maybe that's why i'm always delogged when i move to an another page... i'll try ...
EDITED => ok no more bug but me still stupid...
Thanks @Canabary, sorry for the lost of time...
@Canabary =>
Yeah ... each time. Sorry T_T, i'm using FireFox 7.0, dunno if it can help...
Edited => i've just try again and it does the same again...
If someone as the same problem, can you mention it too please.