[horde] Can't Login on IMP

[Postmaster]

Hi, 

I'm having trouble to login on IMP, each time, I try to login, I have the 
same error message "Session expired, please login" That's what I do but I 
have never been able to login ! 

I'm using horde-2.1 and IMP Version 3.0, on Redhat 7.2, you can wiew the 
test page of IMP on http://www.californet.com/horde/test.php, if that can 
help you. 

Thanks for any help 

Richard