Hi,I've looked at the pics you sent me and there is your problem!!! that is a DC power supply! If you look at the output, it shows + and – DIRECT CURRENT.
You need one that shows the output as A.C ~ . My genuine Alesis power supply gives 13.6 volts out off load (not plugged into the DM10) it is labeled 9v~ out. Do not be tempted to use the 110v power supply as that will give twice the voltage out when connected to 220v and will also get very hot and be a fire hazard. you should be able to get the correct one from Alesis or look on E.bay. If you have any problems, let me know and I will contact Alesis here in the U.K for you. Best regards, Good luck, Roger
P.S yes, using the original with a 220v down to 110v transfomer will be fine, when you get it going I would reccomend you do the update again if you still have any problems. Let us know how you get on