WebDynpro app on Motorola MC55 mobile device

Hi,

I have created a small WebDynpro app, but it's not working on Motorola MC55. After SAP web login (which is ok) I show a screen with 4 buttons, but even that is not working, the click is doing nothing. I put a breakpoint in the action for that button, it's not stopping.

Is there a setting for a webdynpro app for mobile devices?

Thanks,

Charlie