Clean all of the filters especially the one at the bottom of the housing containing the dirt catcher. Remove the catcher and you'll see it down on the left. Either shake it out well or use another vacuum cleaner. Clean the detachable filter cassette on the back of the machine. Take the filter out of the back of the dirt catcher, it's made of the same material as the first one. With all of these cleaned, your machine should really suck !!! If all else fails, take it to your dealer and get all of the filters replaced.
Ian, November 2007