Greetings. I purchased and installed the new model packs for the HD500. Since then, the volume pedal does not work. nor does it work as a wah wah pedal on any of my patches. It clicks in as a wah wah pedal, but the pedal does not work any longer. My guess is that some global setting has been affected by the installation of the model packs. Any help would be appreciated, and in a simple step by step manner, assuming that I am a complete idiot. Thanks in advance.