Windows Service To Copy Files?

I have written a service to run an exe.What I have also tried to do is check if the file is present on the local computer, and if not copy it from a networked drive to the local computer.

If File.Exists("\\static1\software\testapp.exe") = True Then
File.Copy("\\static1\software\testapp.exe", "C:\Program Files\Testing\testapp.exe")
End If

I have previously ensured that the directory exists.When I run this as a service, it doesn't work. No errors are thrown up, but the file is not copied.When I put this into a windows forms application it works fine.

I have used:

Imports System.IO

In the header. why this won't work?

I have also tried:

My.Computer.Network.DownloadFile("\\static1\software\testapp.exe", "C:\Program Files\Testing\testapp.exe")

And that also does not work.I am trying to run this on Windows XP Professional.