Can't change images in Admin

I'm using OC 2.1.0.1. Just installed my first OC site.

I uploaded a few images for store logo and product images. Now, I'm no longer able to edit any images. When I click on the edit button, the screen grays out, but no modal window to change media comes up.

Any ideas?

Any help on this would be appreciated. I've tried everything I can think of.

I have found the Solution:

In my admin folder I have a php.ini file

I have changed my memory_limit = 64M; to memory_limit = 128M;. Now it works fine. I am able to edit images again.