Unable to Move + Wordpress

[ValerieA]

Hello, I've read all the posts on how to allow me to upload files when I get an "unable to move" issue. I changed my settings to "777" on the folders needed, and upload files.
After changing the permissions though, I can't access the WP-login page. When the permissions are "755" I can log into wp, etc everything is normal, yet I can't upload photos. When I change it too "777" I can upload photos but not do anything else on my site. Please help. At the moment, I am going back and forth, when I want to upload I change the permissions then when I'm finished I change them back. There has to be another way, or something I missed.

My gallery is http://www.frixion-unleashed.com/gallery

[Αndré]

I don't know how changing the permissions of Coppermine files should affect Wordpress. So I assume you're changing too much at once.