1: Cronjobs is not working like it should, i cannot create a cronjob like they ask.

2: My site ( www.istudios.nl ) dont works good, if i click on something i get: Not Found

The requested URL was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

3: if i want to download a premium theme i get:Fatal error: Maximum execution time of 30 seconds exceeded in /home/flynaxne/public_html/includes/classes/rlZip.class.php on line 113

Who can help me?