Error when trying to tune... tried everything

[dmax44power]

17:15:22.184: ECM seed is: $9C75
17:15:22.185: Unlock attempt 1 of 1
17:15:22.306: Initializing ECM...
17:15:23.621: Error: Failed. Controller has returned to normal operation, please retry the operation.
17:15:24.246: Total time: 00:00
17:15:24.249: Rebooting ECM... (please wait up to 8 seconds)
17:15:25.397: ECM has booted successfully...
17:15:26.400: Clear emisison related DTCs...
17:15:26.429: Clear DTCs for all modules...
17:15:28.492: Autodetect interface ...
17:15:28.769: Interface firmware version: 2.7.22
17:15:28.770: Connection to [FSV2] interface is OK
17:15:28.771: Autodetect ECM...
17:15:28.797: Connection to ECM is OK
17:15:30.126: Disconnecting ...
17:15:30.696: CAN-VPW Bridge Deactivated
17:15:30.697: Disconnected
17:15:35.278: Done!

i have an 08 LMM and this error keeps coming up when I try to read my ecm.. and also can not flash!... but v8 works for some reason? i was able to tune with v8 and i would rather use v7.5.. i tried unplugging the radio fuse and info.. same error.. whats the deal?/

[Blacky]

The V8 software uses native CAN comms and is more robust than V7 for CAN vehicles.
The V7 software uses a similar concept to GM's CANDi module that translates between VPW and CAN. There are some things that V8 does much better then V7 because of that intermediate step that V7 has to do.

If you send me (paul@efilive.com) the trace files for V7 (that fails) and V8 (that works) I can compare them and try and see what might be causing the CAN-VPW bridge to fail.
You can find out how to get those trace files here: http://support.efilive.com/kb_article.php?ref=8254-QOGC-9586

Regards
Paul