DR Bucket Problem - One machine has x4 master has only x1 bucket during DR?

[askhamdesign]

Hi All

Just testing Vray 150sp1 with max 2008 & vista on my Q6600 machines and noticed that when I do a DR render with two machines the master machine with the license only uses one bucket to create the IR map but the slave machine uses all four. After the IR map is created all 8 buckets are used fine?

Not sure why the buckets are missing im sure it somthign simple ive missed?

Its affecting the render times as you can see:
1m38s on A single machine
1m04s on With 2 machines

Any ideas?

Cheers

Simon