TIdServer, TidClient & TPagecontrol problem

I'm making a chat program where users can send private messages. Those private messages are display on a different page through a TPagecontrol or a TTabsheet (its a shame, I dont remember, I tried to solve it a loong time ago ). When i create a new page and try to display it, the servers GUI freezes for as long as the client is connected. It does it if I have the pages already created/added in IDE too. It happens when i activate the new page.

Can someone hlp(F1) me?

I hope I was clear enough