Check all doesn't work

[Dentrix]

Hello.

I have a issue with the check all box on the private messaging page.
When i select the check all box it doesn't select the private messages.

However when i select the check all box on a threadlisting it does work.
It doesn't work on the private messaging page. What might cause this problem? is it theme related?
I've disabled all plugins through the admin panel so i know it isn't caused by a plugin at all.
Any help is appreciated.

Thanks in advance.

[effone]

Its a javascript / jQuery causing the error (such as if you have older version of fancyCollapse).
Link me to the site ...

[Dentrix]

Its a javascript / jQuery causing the error (such as if you have older version of fancyCollapse).
Link me to the site ...

I looked at some of my JS files and found the issue.
It had to do with this code: expandables=null;

At the moment i have it hosted on WAMP(on my localhost)
I need to test everything before i move it to a host.
so unfortunately i couldn't provide you with a link.

But it has been fixed, Thank you so much for the help.