Matlab not registering webcam

Hi, I am trying to use either the videoinput function or the webcam package to input in a webcam. I recently switched from using Matlab 2012b to 2014a in order to use the webcam support package, and have noticed that the new Matlab no longer registers the webcam (using imaqtool.) Is there a way to fix this? I have tried reinstalling all the support packages and drivers but nothing has worked.

Thanks for any help.