"Unable to check for updates."

Hi! I "have" many SuSE boxes with 9.0, 9.1 and 9.2 versions. Everyone of them has had lot's of problems trying to contact update service. The icon for the susewatcher is all the time yellow and I always get a message that says: "Unable to check for updates." While I never got these problems before, currently it's about all I get. What's wrong? Something has changed somewhere (outside my boxes)... -- HG