That is esxactly what happened when I installed my AIW 9600 RegTV tuner, viddy capture card and tried to use the remote.
I couldn't figure it at first--but buried in the interface or MCC (MediaControlCenter)is a utility that will help you update the Guide plus or whatever it is called fro your version. You can also click on the Guide when it appears and it will ask you if you want to update. Thius has to be with the Mouse and Keyboard mind you--the Remote won't get that update going...
I would highly reccomend you get the latest drivers from the ATI website for your Remote Wonder, MMC, Hydravision, etc. as the ones on the installation CD are pitifully out of date usually and will oftentimes cause miscellaneous errors...