UBB.threads PHP Forum Software Community Forums UBB.threads 6 Version 6 Support Instant UBB code not working.

I upgraded UBBthreads from 6.4.1 to 6.5.2
Everything went smoothly in the upgrade process.

But somehow the instant UBB code just dont work.
I click on it but nothing happens.
No code is put inside the textbox.

All files are new except the main.inc.php and such.

Any suggestions as to what can be wrong?