How do I run a .bat-file on a server from a client?

Question

Basically I'm running a WPF-application on a server. It's just two buttons. If I click on a button from a browser on a client computer I want to be able to run a .bat-file on the server. I suspect that my application is trying to run it in the client browser instead and therefore I get "Trust not granted". How do I fix this?