I connected a gamepad directly to my Nexus 7. After clicking on the dialog box to support the gamepad, VO fails to load the new client. Any suggestions or did not wait long enough?

Wait long enough? Software doesn't grow out of bugs. People have to fix them!

If it gives you any error messages, post them. You might also want to check out an app called 'aLogcat' so you can view the log on the phone and copy/paste any relevant info about VO.