Audio popping in playback on iRig Pro Duo

[Alun Crewe]

Hi, 

Has anyone else had pops and ticks in the audio playback of MIDI data from Cakewalk? I don't get any problems when playing back normal audio tracks, only MIDI and periodically, when the application is idle it suddenly throws up this error:

If I hit play again it's fine (but still with pops). Any help would be appreciated.

Thanks, Alun