Hi su29,
As Ralph say, is better if you detail your problem (error code, Operating System, WAS version,...)
What you want is call from one windows machine (without WAS installed in it) to another?
If yes, my recommendation is to use Administration Thin Client, i have used a lot of times, the link is for v6.1 you can found for later versions too.:
Using the Administration Thin Client pic.dhe.ibm.com/infocenter/wasinfo/v6r1/... Tell us if you need more support.
regards,