posting problem

why can i not post replay anyway?
When i try replay a thread:

elnino, you do not have permission to access this page. This could be due to one of several reasons:

Your user account may not have sufficient privileges to access this page. Are you trying to edit someone else's post, access administrative features or some other privileged system?
If you are trying to post, the administrator may have disabled your account, or it may be awaiting activation.

To elnino
Some forum like exchange sections are read only and there you can´t reply to another user posting.