Qt???

Hi, I'm using SuSE 8.0 pro with Kde3. I'm trying to install a tarball, but the ./configure claims there is a Qt error: checking for Qt... configure: error: Qt (>= Qt 3.0) (headers and libraries) not found. Please check your installation! Anybody have a tip on this? Do I have the wrong version of Qt, or...? How to check this? And if I have to update the Qt, is this possible without problems? Regards, Thomas