Unable to advance 'Timing Adjustment' Elgrand 2005

[Elgrand2005]

Hello

I recently purchased the Datascan II software and everything works fine except I'm unable to advance the 'Timing Adjustment' on an Elgrand 2005/Series 2.

The same setup has increased the timing on a series 1 but it won't do it for the series 2... any ideas on why that might be?

cheers