What is the KDE version the kdewebdev module relies on?
Quanta Plus, Kommander and the rest of kdewebdev usually require the latest or the second latest stable version of KDE. Quanta 3.4.0 will run on KDE 3.4.0 or KDE 3.3.x, Quanta 3.3.0 will run on KDE 3.3.0 or KDE 3.2.x. The newest KDE version is always recommended, as some things might miss in Quanta or will not work as expected if you use an older KDE version. This is especially true for the VPL mode, which heavily relies on the KHTML browser engine.