Error message when trying to change Read Settings

I get this error message when I try to save changes to the Reading Settings as well as the Writing Settings. My admin have full access rights and I use a web hotel where I have installed my WP. What do I do wrong?

This is the error message that I get:
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Error 403: Forbidden

Your PHP settings have been disabled by an H-Sphere administrator.

* Your current PHP configuration:
* This configuration was changed: Mon Apr 12 00:06:20 UTC 2010

Please bring your PHP configuration in compliance with admin settings or request your administrator to re-enable support of your settings.