cluster storage

dear sir,

I am trying to do the cluster storage with the Rock Cluster storage operating system . I have install the rock cluster on the main server . and I want to connect the client with the PXE boot . when I starting the client then it boot from the PXE boot into the mode of compute node. but it ask the where is to be stored the I have give the path..then server says that not able to find the directory path...
Steps:-
1) insert-ethers
2) client is started with the PXE boot.
3) it detects the dhcp .
4) At last it demand where is to be started by cd-rom, harddisk ,nfs etc.

then I started with the nfs and I have given the lanIp of server.and server is detecting the client but client is not finding the filesystem directory. into export partition directory
but it is not taking path....
PATH:-
/export/rock/install

it is not finding this path then it is not able to start the o/s from PXE boot..

Is there any solution and manual of rock or anyother solution then u can reply to me...

contact via mail
er.surendersharma@yahoo.com

thanks

/export