Touch input not working with OnPress on Windows Store Apps

[Meltdown]

I have some touch screen controls in my racing game I have built for Windows Store Apps (Universal).

I am handling the OnPress method for the game's controls. I've tried disabling all input methods for the camera, and enabling touch input.

Yet player's on Windows Phone, or on tablets running Windows Store Apps do not have any of the controls working.
Unfortunately I don't have a Windows Phone or tablet to test with so I can't debug.

The touch input works fine on Android without any problems.

Any idea what I could check for this?

Thanks

[ArenMook]

Can't say I have any suggestions for you here. Also... windows phone is still a thing? <_<