RC3 in DR but just 50% cpu use by all hosts

topic say it all
I run a still in max9 via DR and RC3 but it uses just 50% host CPU
I thought its was a matter of rc2 and it is fixed
I am wrong ?
scene render dialog tells me RC3
memmory in use is less the 2 gb
32 or 64 bit makes no difference

any ideas??

wasnt there a problem at some point with displacement only using 50% maybe im wrong or maye it was taken care of in either case it seems im not much help

I think is related with this post

http://www.chaosgroup.com/forum/phpBB2/viewtopic.php?t=17177&postdays=0&postorder=asc&start=25

look for what Vlado said about the maxscript listener input

hope it helps

a.

ah yes - hope is solved in rc4