Problem with live website: I need to refresh everytime to see changes

Hi.
I am building a complex website using Php and Symfony framework and i am trying now to move from localhost to the webserver.

The problem is for most actions i do in the website i need to refresh the browser everytime to see the changes. For exmple in login form i click login, the page refreshes but stays in the login form. If i hit F5, it will redirect to the correct page after login.
The same with forms. The changes are saved to the db but needs a lot of time and refreshes to see the changes in the page.

I dont know if it´s a problem with the server or someting related to Symfony itself.
I have already asked in Symfony forum (no anwser till now).

Does anybody had a similar problem before?
This is really odd.