= OK both
TPOTM + AjaxShoutbox
= OK both
TPOTM + AjaxShoutbox + MChat
= TPOTM OK, AjaxShoutbox OK, MChat NO.
AjaxShoutbox + MChat
= AjaxShoutbox OK, MChat NO
Let's say TPOTM passes the round being working under every circumnstance
MChat is incompatibile with Ajax Shoutbox, being the latter working but MChat.
And again, TPOTM don't use Ajax, javascript or Jquery of sort
so please seek support where you got the extensions from.

TPOTM is PHP/HTML5/CSS so I can't imagine any interference of sort.
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