[sqwebmail] Urgent help -- authentification problem with sqwebmail vpopmail5

[Administrateur Liptinfor]

hi,
i install successfully sqwebmail3.5.0.20030301 and vpopmail5.2.1 everythings 
looks fine.
but authentification on sqwebmail interface is randomly successful for my 
virtual domain users.
the setenv SQWEBMAIL_TEMPLATEDIR don't work also.
Is anybody already have this problem ??