process execution fails

[Jorge]

I'm writing an application that uses system.diagnostics to run an
executable that will allow me to create a map. However the program
fails to start or if its start it is not creating any output. I have a
batch file with the exact same code and it does not work. Can anyone
help? This is the code:

Process p1 = new Process();
p1.StartInfo.FileName = programName2;
p1.StartInfo.Arguments = arg2;
p1.StartInfo.RedirectStandardOutput = true;
p1.StartInfo.UseShellExecute = false;

bool retVal = p1.Start();
//when it gets to this if statement for some reason it
// does not do anything

if (retVal)
{
output2 = p1.StandardOutput.ReadToEnd();
string ouput4 = "worked";
p1.WaitForExit();
}
else { output2 = "did not work";}

//Write psxy process output to file

FileStream fs2 = new FileStream
"c:\inetpub\wwwroot\temp\TEMPO.ps",FileMode.Create ,
FileAccess.Write);

StreamWriter w2 = new StreamWriter(fs2);
// when it writes to the file it does not
// write anything

w2.Write(output2);

w2.Close();

Thanks in advance,
Jorge