Page 1 of Acoustic Solutions 421 Hack not working for region change

I have today bought an Acoustic Solutions 421 from Richer sounds. I have tried the hack posted on here; open,setup,next,prev,next,prev and the only codes that appear on screen are the 3000/3001 and 5000/5001. ( these are on the right of the screen) I cannot find a way of changing the region. Is there a new hack for this machine? The one I bought is a region 2 model but Richer Sounds are selling a multi region version for £30 more. Can anyone help?

Thanks

About 9 months ago i bought the 321 model region 2 hoping to use the hack supplied here, as many people found it worked. Everything worked except the multi region hack. After serching the net i found that on some players different chip sets were used, which allowed some to be hacked and some not, this is how some players can be sold as multi region and some not.. I therefore believe this might be the case for the 421 also. It will probably be just one chip but i am not 100%. I have bought the 421 for my sister and also found what you did. i have looked everywhere for alternative hacks, with no joy. I have even opened the player up to try and find what chips are being used, but again no luck. If you want multi region you may have to take the player back and get a different model. Sorry couldn`t be more help.

VBINSANE