Windowmanagers with xFree 4.0.3

I have downloaded and installed (with rpm -Uvh) the xFree 4.0.3 updates for SuSE 7.1. Trouble is, having done that the only WM I can start eithere manually or via KDM ie KDE (I have 2.1.2). It was OK before I changed to the new xFree. Can somebody tell me where to start looking to put this right ? Thanks Mike