I have a Philips Pronto 7500 and a xbox 360

I'm trying to cycle through the guide quickly.

If I press the arrow button once they all work however, if I hold down any of the arrow buttons it should cycle through the guide quickly.

I have tried the following in the Pronto NG software.

Setting the duration to the following times:
Default, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45.

Most of them work however, some of them make the guide jump 2 slots if they are pressed once. None of them work with a long press.

Hope the above makes sense and someone can help.