The update image button doesn't work at front-end

I have problem after I upgraded Joomla from 1.5.15 to 1.5.23. The Edit "Update image" button at front-end didn't work anymore. After I click on the button, it went to the error 500 page. Please helppppp. :S

Is this a profile gallery issue?

Please give CB version?
Profile Gallery version?

Turn Joomla debug on and retest.
Check your error logs.

I'm not sure that it is profile gallery. The problem is at the front-end, the edit update image button doesn't work any more. It used to work, but after I upgraded joomla, it stopped working. Also, the upload new profile image button doesn't work either.

I called my hosting, they said they can see all the profile gallery and the comprofiler folder that has all images uploaded by my members are still there, which proved that it used to work. Also, the GD2library is working find.

Where can I find the Joomla debug? How to check the error logs? I'm sorry to bother you. I'm not the real techie kind of girl, but I'm a great learner. Thanks for your attention.

Emy

Hello Nant,

I already turned the debug on. It showed 26 queries logged. I really don't understand what to do with all those. Please help. Do I need to show all 26 queries logged here?

Thanks

Emy

[mod note: moved from profilegallery forum area to general CB area]

This is not a CB Profile Gallery issue.

I also asked (but have not received yet):

CB version?
check your error log?

You can turn off Joomla debug if all you see are queries.

Please give screenshots of your issue as it still is not clear.

My CB version is 1.4
I took screen shot of the problem. I hope it is the right screen shot you need.
I don't know how to check error log. I'm sorry to answer late.
The button that doesn't work is "update your image" button. When I click, it was error 500.