I activated each plugin one at a time with no other plugins activated. The only one that caused a problem by itself was WordPress Database Backup. So I downloaded the .php file and removed and blank line from the end of the code. It worked fine.
I also changed the memory allocation in wp-config to 96MB. That seemed to solve the memory error messages.
As I activated each plugin one at a time, I received the blank pictured above for nine different plugins. Each time I got the blank page, I moved the plugin via FTP to another folder and reloaded the page. Only one plugin caused a completely blank page... Simple Tags.
I then logged in to my hosting server and changed the PHP Configuration from PHP5 (Single php.ini) to PHP5. That seemed to help.
I then downloaded each plugins' main .php file via FTP to check for additional blank lines at the top or bottom of the file. Or adding ?> at the bottom of the code where it was missing. This helped solve the activation problem for a few of the plugins once I reloaded the file and refreshed the page.
I was finally able to activate the remaining plugins by downloading the main .php file via FTP, hitting the back button to take me back to the Manage Plugins Page, then re-uploading the .php from my desktop (after checking the file for the above errors) via FTP and finally refreshing the Manage Plugins page. Once I refreshed, the plugin was activated.
Great! Right? No, now I cannot log out of the admin console.
Does everyone who uses WordPress go through this?
I appreciate your help. If anyone has any ideas as to where to go from here, I'm all ears.