Wordpress Problem - Blank Result Page - Shared Hosting

I'm having a problem when I try to finish the validation of a Wordpress plug-in named WPG2. If you've solved this problem before, or have any ideas I could try, please do message me as I'm willing to pay a premium to have this resolved as soon as possible. The plugin successfully activates from within the Wordpress admin panel, and displays the initial path config page. After entering correct paths and clicking "Save Changes", the page reloads blank. The plugin's confim validation page also now displays blank. The php memory_limit displayed via phpinfo() says 40MB, and the plugin's requirements are 16MB. I've tried the .htaccess to override the 40MB memory limit to 64MB but I get "500 - Internal Server Error" on all pages until I remove the .htaccess line. Both Wordpress and Gallery2 are otherwise working without any problems. I've also already tried deactivating and reinstalling the plugin. Please message me for the URL & Login. Thanks! Wordpress Version: 2.6.3 Gallery 2 Version: 2.3