Vista - Unknown ExecutionEngineException

We wrote an application called RemoteLauncher, which runs specified
application on a remote computer under the specified user name and password.

Its relevant code is as follows:

ConnectionOptions co = new ConnectionOptions();
co.Username = args[2];
co.Password = args[3];
ManagementScope mgmtScope = new ManagementScope("\\\\" + args[0] + "\\root\\
cimv2", co);
ManagementPath mgmtPath = new ManagementPath("Win32_Process");
ManagementClass procClass = new ManagementClass(mgmtScope, mgmtPath, null);
object[] inArgs = new object[] {args[1], null, null, 0};
procClass.InvokeMethod("Create", inArgs);
if (args[4].ToLower() == "t")
{
pId = Convert.ToInt32(inArgs[3]);
Console.WriteLine("Waiting for process to stop...");
try
{
while (System.Diagnostics.Process.GetProcessById(pId, args[0]) !=
null)
{
Thread.Sleep(100);
}
}
catch
{
Console.WriteLine("Finished!");
Thread.Sleep(1000);
}
}


We use an application to execute the RemoteLauncher, using the following code:

myProcess.StartInfo.FileName = @"K:\exe_debug\sysctrl\RemoteLauncher.exe";
myProcess.StartInfo.Arguments = compname + " ipconfig/flushdns administrator
passw0rd t t";
myProcess.StartInfo.CreateNoWindow = false;
myProcess.StartInfo.ErrorDialog = true;
myProcess.StartInfo.UseShellExecute = true;
myProcess.StartInfo.WindowStyle = ProcessWindowStyle.Normal;
myProcess.StartInfo.RedirectStandardOutput = false;
myProcess.Start();
myProcess.WaitForExit();


When this application runs under a 'regular' user everything works OK. But,
when this application runs under the system user (using a service), we get
ExecutionEngineException in the RemoteLauncher application.
The debugger points to the 'InvokeMethod' statement.

Any idea?