CCK ahah image upload working if admin, but not for others! A content type have image field. When uploading image as admin, everything works fine. But If i logged in as a normal user, and click on upload , it gives error ahah http error alert!

Also found add another button also giving same error.

What could be the issue?
What Drupal version do you use?
May I have list of modules you have?
What messages do you have in watchdog?

First think I have is drupal permission problem.