My phpNuke portal times out frequently.Generally, this issue is caused by an error on your website or database. Usually it is because of incorrect setting for the theme you use. You can find a lot information about such issue at:
http://www.nukecops.com/modules.php?name=Forums
In addition, heavy PhpNuke sites have problems because of the webserver's timeout setting. In such cases please try disabling any additional modules in your PhpNuke.
