Hello trinhanhngoc. I assume you read my posts over at the CTM forums hence why your here. Smart move IMO. I'm fairly certain that Horizon staff can help sort out your issue with Rollback (which probably stems from CTM).
Please keep us updated here on your progress.
PS Should you wish to buy Rollback then i recommend you wait for it to be discounted on this site here
RollBack Rx Software with a 65% off Discount Code - A Virtual Time-Machine!
As you can see that deal currently expired but Im sure another one will come along soon. You can actually subscribe to notify you of one when it happens.