Problem with FastCgi idle-timeout

[papasj]

Hello,

I'm using Horde3+IMP as a webmail. Each time someone enters an invalid login he gets a 500 Internal Server Error. The apache logs says:

Code:

[Fri Jul 04 03:24:42 2008] [error] [client *********] FastCGI: incomplete headers (0 bytes) received from server "/var/www/fcgi/*****.com/php5-fcgi-starter", referer: http://webmail.****.com/horde3/imp/redirect.php
[Fri Jul 04 03:26:30 2008] [error] [client *********] FastCGI: comm with (dynamic) server "/var/www/fcgi/webenergie.gr/php5-fcgi-starter" aborted: (first read) idle timeout (30 sec), referer: http://webmail.****.com/horde3/imp/redirect.php

I've seen that this default 30sec idle timeout of fastcgi exists in Debian Echt which is my system, however I've seen in /etc/apache2/mods-available/fastcgi_ispcp.conf
that the -idle-timeout option is set on 300.

I've changed that value to an even higher one but still the log file shows 30sec. Does anyone know what i can do in order to actually change this value ??

thanks
giannis