JRUN Spiking on 2008 server

I know this topic is been discussed a lot , I just installed CF Enterprise on 2008 Server and on my local dev box on Vista buisness .
Problem is that when ever there is request comming to access the web site Jrun spikes to 80% 90% CPU usage and then comes back . i have checked log files etc but have no clue why its hapenning , i dont know how to do thread/stack dump if some one could help me with this . or any suggestion how to proceed on this . this problem with only at server 200 and CF combonation , at my dev box there is no issue and its running just fine,


Thanks in advance