Darren,
Thanks for that, it helps heaps.
Like Trevor, I tried the style and it played for me. There is a great deal of dynamic range though and some of the organ ranges from loud to soft throughout and I found that the soft sound gets lost in the other instruments.
As test, to see if it might be the style's dynamic range, generate a song and then solo the organ and let the song play through and see if the silences still occur. It's also useful to look at the volume bar under the organ track's name to see if sound is being visualised or if that stops happening from time to time.
If it turns out that it's the dynamic range that's causing the problem, this can be made more uniform using the PG Music plugin called PG Dynamics. (I'll explain a bit more about that a little later if needed.)
Like Trev said, it would be good to use "File | New" to create a sparkling new worksheet in case there is some setting that's no obvious present in the existing one.
Regards,
Noel