[otrs] Urgent problem.. Please help.

Hi , I have an urgent issue.. When we click an open ticket to assign the responsible it goes directly to the add note window. When we click the close ticket button it goes to the add note window too. It was working fine for the past 6 months. Suddenly this issue happened. We haven't changed anything in the configuration. Probably it's not reading some kind of configuration or there is a mismatch somewhere.. This is really urgent.. Thanks a lot... Happy new year to all of you. Regards, Sarper