If you are using Vista is it imperative that you run ALL your poker software using the 'run as administrator' option or else there are going to be problems.
To do this with Poker Tracker Omaha, right click on the Poker Tracker icon on your desktop and select "Run as administrator" from the pop-up menu. You should then get a prompt from Vista asking you to cancel/allow the program to run. Click on the "Allow" option to continue.
To get Poker Tracker Omaha to run as administrator each time without having to remember to select it from the popup menu you can just right-click on the Poker Tracker desktop icon and select "Properties" from the menu. On the next window, click the "Advanced" button and check the "Run as administrator" box on the next window. Then apply all the changes. Now you can just start Poker Tracker by double-clicking on the desktop icon and it should again prompt you to cancel/allow Poker Tracker Omaha to run.
ALL YOUR POKER SOFTWARE NEEDS TO BE STARTED THIS SAME WAY. This includes PokerAceHUD, GameTime+, any of the poker site software, everything.