2009 Cadillac CTS 3.6L I've had some work done to my engine & I need to tune it so I bought the MPVI3. It registered fine & I can use the scanner but while following the instructions to "read" my stock tune as a backup with the Editor it won't "read." The READ under the FLASH tab is grayed out & I can't choose it. The WRITE is there, or chooseable but not the READ. I can read my tune with the engine running (odd?) but not with ignition in ON position. Any help would be appreciated.