Zend certified PHP/Magento developer

Magneto add to cart not working with loadrunner

I am doing performance testing with loadrunner. The add to cart request is not adding any products to the cart instead it just redirects to another page when i replay with loadrunner. I have correlated the form_key which seems to be the only dynamic value in the request. I cant find anything missing. Does anyone have experience with this?

Request screenshot

Thanks,
Dave