After compiling APC, ispconfig login not show correctly

[adrenalinic]

Hello
Hi to all!
I have compiled today the apc as this tutorial:
http://www.howtoforge.com/apc-php5-apache2-debian-etch

but now the ispconfig login not show the fields to write admin user data to perform the login..

no error in the log!
help!

[adrenalinic]

Now I see this error:

PHP Fatal error: Class 'db' not found in /usr/local/ispconfig/interface/lib/app.inc.php on line 62

[adrenalinic]

After disablign apc (to 0) all works nice.
With apc enabled, the ispconfig login form not appear and some times navigating websites a fatal error occour, any advice?
Thanks for the attention.

extension=apc.so
apc.enabled = 0
apc.shm_size = 30M
apc.include_once_override = 1
apc.mmap_file_mask = /tmp/apc.XXXXXX

[till]

I recomend to use xcache instead of apc, it is more stable on my servers. If you run debian or ubuntu, you can install xcache with:

apt-get install php5-xcache