[imp] IMP very slow ...

[News-Horde]

Hi,

I have a little problem.
I installed Horde/IMP/turba/Mnemo/Kronolith/Nag on a debian with :
- mysql-4.0.13
- php-4.3.2
- apache_1.3.27
- imap-2002d

All work good but IMP work very slowly. I install "ZendOptimizer-2.1.0b" for 
optimize php but nothing change.

I have no speed problem with the other applications (turba/kronolith ... 
etc ...)

If anyone have an idea.

Thanks a lot,

Fwed.