Get and Post wont work ?

[eluser]WanWizard[/eluser]
Check the manual.

If you enable query strings, you enable them for routing only. CI will expect a query string like http://www.example.org?c=controller&m=method, and not every method of helper supports this (they expect URI segments). Enable query string doesn't mean "allow all possible query strings to work".

The fact that posts don't work is probably related to you enabling query strings as well, as that will disable segment routing so none of your controllers will be accesable anymore...