Local & Remote Service Monitoring?

I put together a small app I want to use on my local network for service monitoring across a few of my servers.

I'm using vb.net express 2010 with system.serviceprocess imported The problem I am having is that my code only seems to work locally, and will not retrieve the service data for any server on my network.

For example, my local machine is called "office-pc", and when running the app on it, I get all the service information.

Dim localServices As ServiceController() = ServiceController.GetServices("office-pc")
For Each localservice As ServiceController In localServices
ComboBox1.Items.Add(localservice.DisplayName)
Next

But, if I want the service info from my web server called "casper", I use the same code, but i change the GetServices() parameter like so;

Dim localServices As ServiceController() = ServiceController.GetServices("casper")
For Each localservice As ServiceController In localServices
ComboBox2.Items.Add(localservice.DisplayName)
Next

After a few seconds delay, nothing happens, ComboBox2 remains empty.

It was my understanding that GetServices() would get the local machines service info unless a machine name was specified, which in both cases is true.

So why isn't it working? Do I need to set something up on the network servers first?