Problem with process privilege escalation

Question

string file = "C:\test.bat";

ProcessStartInfo psi = new ProcessStartInfo();

psi.Domain = "KRISTIJANK";

psi.UserName = "John";

psi.Password = sec_pass;   //created in Form_Load

psi.WorkingDirectory = @"C:\Windows\System32";

psi.FileName = @"cmd.exe";

psi.Arguments = @"/C del " + file;

psi.UseShellExecute = false;

Process.Start(psi);

 

Idk whay this code not working...

CMD window appear and disapear without an error.
Maybe process arent started as admin? :/ 

 

p.s. John is admin