YAST problems

Hello everyone:        I seem to be experiencing problems with YAST.  I lost my MSN Messenger clone, Kopete. I went to the site, downloaded the rpm and then tried to install it.  YAST opened and then disappeared from the screen.         Thinking the problem might be with Kopete, I downloaded the aMSN rpm and had exactly the same problem with YAST.   I then tried the same thing as ROOT with exactly the same results - YAST would start and then disappear. I could try re-installing from the DVD but, if memory serves, I was having problems with YAST before I updated both the BIOS and the SuSE packages with YOU.         Any suggestions? cheers, Mike