accessing server side exe's from asp.net

Question

Hi, I have witten a couple of console exe's in C# that sit on my server that I want to call from my ASP.Net pages when I click on things like a web form button control. However, it is not allowing me to call the exe ? Is this a secuirty issues or can I do it via web services and/or .net remoting ? If so, does anyone know of the client, server calls I would need to make ? Cheers S