C# Remote Process username and password incorrect

const string file = "cmd.exe";          

 var sspw = new SecureString();           

foreach (var c in "password")             

sspw.AppendChar(c);           

var proc = new Process();          

 proc.StartInfo.UseShellExecute = false;          

 proc.StartInfo.WorkingDirectory = Path.GetDirectoryName(file);           

proc.StartInfo.FileName = Path.GetFileName(file);           

proc.StartInfo.Domain = "REMOTEPC";         

proc.StartInfo.Arguments = "";         

proc.StartInfo.UserName = "username";         

proc.StartInfo.Password = sspw;         

proc.StartInfo.LoadUserProfile = false;         

proc.Start();