SQL 2005 cluster nodes freezes every 10 minutes

Hi

I am having sql server 2005 cluster with 2 nodes. For every 10 minutes ( exactly10 min) the node freezes and the sql sessions drops (like from 600 to 150 sessions) i am not able to start session (its a webserver database) , so i have to stop the freezed node and start the other , and the same repeats for this node also after 10 min exactly.

Can anyone please help me to fix this.

Thanks,

Naveen.