18F4431 Oshonsoft 360 DEG/REV compass Incremental encoder problem

Hi,
I'm trying to get a compass Incremental encoder to output 360DEG/REV on an 18F4431 programmed using Oshonsoft.

The IE outputs 0 to 359 4x/REV. This is using the 18F4431 QEI hardware.
Any ideas please?
Camerart.