SNMP on X64

Hi,
I am working on SNMP agent dll development on Windows x64 and x86
platforms. I am able to successfully develop it on x86 platform on
windows 2003 server. I am testing the with SNMPTOOL.exe which I got
from platform SDK. The problem lies in x64 platform. I am not able to
debug to find the problem in the source code of the "snmp" regular dll
on x64 platform though I run msvsmon.exe on the target x64 machine. The
required environment varibles for x64 platform are set while developing
the target x64 compatable dll from x86 platform.

Are there any particular steps that are need to be followed to develop
x64 compatible agent dlls. Why the same dll which works in x86 does not
give the same out put on x64 platform? Why am I not able to debug the
same?

How I tried to debug is:

1. Start the SNMP service on the target x64 machine. Before that I
ensure that the required registry entries were created properly and the
path of the agent dll is available to the service. Run the msvsmon.exe
(which is built for x64 machines) on the same machine.
2. Attach the remote SNMP process on the x64 target machine to the IDE
which has snmp agent dll(a regular dll on win 2003 server x86 machine
and targeted to build x64 compatable dll).
3. Run the snmptool.exe from the command prompt by giving the target
machine(x64) IP address in the command OID.

Please guide me.

Thanks
Phani.
//dprsnmpx64debug//

.