PBB ChatBox 1.2.2 - Multiple chatrooms - i made it, BUT...

i made a multiple chatroom version of PBB ChatBox 1.2.2... or, we can say i arrived install this PBB ChatBox MOD multiple, by changing the install mod.php file to create the tables for each chatbox.php and changing chatbox.php to more files... and changing also files which works together...
Well, finaly i have 7 chatrooms...
BUT... a little problem too...
Totally corectly works only the original ChatBox...
The others dont refresh automatically...
they do the refreshing, but the returning result is always the same...
if i post a message and submit it, it dont apears in the Chatbox window till i make a manual refresh  of browser...
IS HERE ANYONE WHO CAN TELL ME WHAT IS THE MATTER?

this multiple chatbox you can find on http://pokec.dharma.sk

in the header there is a button "Zvolte miestnost" and there you can choos the room...

THX