[imp] Session Timeout on login

[Sylvain]

Hi everybody,

I can't log in IMP using the latest version of Horde 2.2.5 / IMP 3.2.3

I always get back to the login screen with the following message : "Your
Mail session has expired. Please login again"

Here is the content of my horde.log file :
Mar 11 11:26:26 HORDE [info] [imp] clean session [on line 882 of
"/www/webmail/horde-2.2.5/lib/Horde.php"]
Mar 11 11:26:26 HORDE [notice] [imp] Login success for xxx at yyy.zzz
[xxx.yyy.zzz.www] to {yyy.zzz:143} [on line 92
of "/www/webmail/horde-2.2.5/imp-3.2.3/redirect.php"]
Mar 11 11:26:27 HORDE [info] [imp] Session timeout for client
[xxx.yyy.zzz.www] [on line 80 of "/www/webmail/horde-2.
2.5/imp-3.2.3/login.php"]

I tried 2 types of SessionHandler in Horde (Files and SQL) and I always have
this problem

Can someone help me ?

Thanks

Sylvain