CreateProcess() does execute notepad and stuff, but not my program

[jetkey]

bool System::StartProcess(LPCTSTR lpProcessName)
{

	STARTUPINFO si = { sizeof(si) };
    PROCESS_INFORMATION  pi;
    
    ZeroMemory( &si, sizeof(si) );
   si.cb = sizeof(si);
   ZeroMemory( &pi, sizeof(pi) );
              
	if (CreateProcess( lpProcessName,   // the path
    NULL,        // Command line
    NULL,           // Process handle not inheritable
    NULL,           // Thread handle not inheritable
    FALSE,          // Set handle inheritance to FALSE
    0,              // No creation flags
    NULL,           // Use parent's environment block
    NULL,           // Use parent's starting directory 
    &si,            // Pointer to STARTUPINFO structure
    &pi )==0) return false;
	else return true;           
    // Close process and thread handles. 
    CloseHandle( pi.hProcess );
    CloseHandle( pi.hThread );
}

My program is calling a copy of itself at a different location with this function. But it doesn't work. Why?

[Thomas1965]

Call GetLastError() and see what the error is.
https://msdn.microsoft.com/en-us/library/windows/desktop/ms679360(v=vs.85).aspx
https://msdn.microsoft.com/en-us/library/windows/desktop/ms681381(v=vs.85).aspx