killing/stopping .exe file while using MS Clustering

Hi,

 We have a situation that we need to Kill/Stop .exe file in MS cluster server. Can it be possible to kill/stop the .exe file while fail-over is taking place from Primary Server to Secondary server.

The service bind with this .exe file is stopped but we can see the .exe file still running in the task manager.

We want to stop that .exe file from Primary server. 

kindly help me to resolve this issue.

Thanks

Bilal