Can't login horde

[manawo]

In psa-horde log:
[error] [imp] Unknow IMAP response from the server ... [on line 644.. /IMAP/Client..]

I have increase the ulimit -n to 102400. I was restart the httpd service, but I can't login in horde.

Can I help?

Thanks.

 

[coldstone]

Do you have the Zend Optimizer activated in your php-Config file ?
/etc/php.ini ( Normaly @ the end of the file )
Try disabling them.

 

[manawo]

I haven't Zend Optimizer in my php.ini.
The Plesk support say:
you need to recompile Apache,PHP and IMAP with
increased value of file descriptors larger than FD_SETSIZE according to the
article:

http://kb.swsoft.com/article_41_260_en.html