Set the security level of your application to either prototype / demo or production in the project security settings.

Mehmet, I really think you should spend some time doing the Mendix online training. Most of the questions you've asked over the past few weeks/months are covered there, and others are readily accessible through our how-to and reference documents.

All of this is available in via: https://developers.mendix.com/

We're happy to answer questions on the forums, but please make sure you look in the documentation and search for existing answers before you ask.