Process.Start() fails

I am trying to call a console application from within my ASP.NET application. The strErrors variable returns:

"System.Configuration.ConfigurationErrorsException: Configuration system failed to initialize ---> System.Configuration.ConfigurationErrorsException: An error occurred loading a configuration file: Access is denied.
---> System.Security.SecurityException: Access is denied."
Here is the code. The executable referred to by the PAMWriterPath points to a custom executable and resides on the same pc. I've given the ASP.NET webapp's Anonymous user account full access to the conole application's directory. Any help would be greatly appreciated.

Process p = new Process();

p.StartInfo.FileName = ConfigurationSettings.AppSettings["PAMWriterPath"];
p.StartInfo.Arguments = "PostSub";
p.StartInfo.UseShellExecute = false;
p.StartInfo.CreateNoWindow = true;

p.StartInfo.RedirectStandardInput = true;
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.RedirectStandardError = true;
bool started = p.Start();

StreamWriter sIn = p.StandardInput;
sIn.AutoFlush = true;
StreamReader sOut = p.StandardOutput;
StreamReader sErr = p.StandardError;

p.WaitForExit();
sIn.Close();

string strErrors = sErr.ReadToEnd();
sErr.Close();

if (strErrors.Length > 0)
bret = false;

sOut.Close();
p.Close();
Thanks in advance,

Mervin Williams