Unable to start service written in .NET 2.0 on Windows XP Embedded

Question

I've created a small executable that can be launched either as a normal application by calling MyApp.exe or as a service by calling MyApp.exe -s. Because I'm trying to keep as simple as possible, I "install" this app by manually running

sc create MyAppService binPath= "C:\MyApp\MyApp.exe -s"

Then I start the service with net start MyAppService like normal.

On two Windows XP machines and two Windows 2000 machines, this works fine. However, on two different Windows XP Embedded machines, when I try to start the service I get the message:

System error 1083 has occurred.

The executable program that this service is configured to run in does not implement the service.

On one machine, I was able to fix this by uninstalling and reinstalling .NET 2.0, but on the second machine this did not work.

I'm not sure how to go about debugging this, and searching google only seems to turn up specific services that fail with this message such as BITS and an Exchange service.

Below are the classes MyApp, which is the startup class, and MyAppService, which is the class that extends ServiceBase. Thanks in advance for any direction on this.

MyApp.cs

static class MyApp
{
    [STAThread] static void Main( string[] args )
    {
        ....
        switch ( arg1 )
        {
            case "-s":
                ServiceBase[] ServicesToRun;
                ServicesToRun = new ServiceBase[] { new MyAppService() };
                ServiceBase.Run( ServicesToRun );
                break;
             ....
        }
    }
}

MyAppService.cs:

class MyAppService : ServiceBase
{
    static MyAppService()
    {
        // ...
    }

    protected override void OnStart( string[] args )
    {
        // ...
    }
}