I dont think that converting will work because the data in the doctype tbale is messed up already, you will have to reinstall ISPConfig and let it create a new database on its own without changing any mysql defaults. If you follow the perfect setup guide EXACTLY, it will work!
I followed the perfect setup exactly... I will uninstall and reinstall ISPConfig and let you know if it works or not. Thanks!
Found the solution! It is working!!! So, to sum up: Do not ever think to change the default encoding in mysql before installing ISPConfig! This will mess up ISPConfig's database and will have unexpected results (errors like "page not found") Thanks for help! Dorian