Trying to scan a Holden 2005 VZ commodore, the Maxisys MS906 could communicate with the engine module but not the SRS module, However the DS 708 communicated with the SRS and was able to read the codes. Seems to be some software issue as the Maxisys can work well with other models and makes of cars.
I could not find "Holden" as a manufacturer in a lot of the forums here or on the support page of the tool itself.