Console Not Able To Communicate With ASM Instance

I am installing 4 Node Oracle RAC 11.2.0.2 on RHEL 5.5 (x86_64) {for the first time} I am having some issues with ASM monitoring from em console. the +ASM instance appears to be "down" on the em console. However i can connect to separate ASM instances on respective nodes and thus know that they are not down. I am trying to find out the reason why em console is not able to communicate with my ASM instance.

DATAPOINT1
---------------
Under Metric Collection Error link, I can see the following error message for all the nodes.

Target: xxxxx
Type: Host
Metric: Storage Data
Collection Timestamp: MON D,YYYY H:MM:SS PM
Error Type: Collection Problem
Messsage: executable nmhs should have root suid enabled
[code]....

Now the problem is that I cannot find any binary named "nmhs" anywhere in the grid installation, but this file exists in oracle database bin directory:
-rws--x--- 1 root oracle 67778 May 2 18:04 nmhs

I am also not sure whether this is the error which tells me about the problem why em console is not able to communicate with ASM.

DATAPOINT2
---------------
I tried to run emctl to check if the agent for the ASM instance is running:
I set the following for running from grid home:
ORACLE_HOME=/apps/RAC/grid
ORACLE_SID=+ASM1
[code]....

I have seen in all the forums, that there is a directory named "agent11g". I cant find this anywhere in my installation. Its not there in the grid infrastructure directory or the oracle database directory. what are its contents?, do i need this for my RAC setup?, how to I create this now?