need help in process.start()

[blakdeath]

I'm trying to run a game from within c#, problem is c# copies the exe file into its own directory, thus the game files are not present and the exe fails to run alone
here's what i have so far
ProcessStartInfo psi =new ProcessStartInfo(@"C:\program files\tibia\tibia.exe");
Process.Start(psi);

i want c# to run tibia.exe inside C:\program files\tibia instead of copying the executable