WordPress continuously crashing application pool in IIS7

WordPress is making the application pool its running under in IIS7 crash continuously for some reason. I can use it for a minute or two in the admin section and it will crash the app pool, but browsing the front end is fine :/

Any suggestions? I have other php sites like Magento working just fine on the box.

When I look at the system log file I get repeated warnings for the app pool until it errors and stops for repeated warnings which the warning code event id is always 5009 which under microsoft says