Debian Sarge has qt3.3 and designer installed.

The kde-devel package is installed. Package of Qwt (libqwt-dev) is also installed but i don't see any plugin installed. (I had installed the kdesdk package along with libqt3-mt-dev and qt3-designer, qt3-doc etc to get my system ready for qt programming). Also funny thing, I went throug kde core api available somewhere in /usr/share/doc/kde (which is what i was looking for not the online version) and the classes nowhere mentions KDoubleSpinBox although it is mentioned in the kdialog.h header file also. I am not able to connect where is it available.
I request anybody who has debian 3.3 installed to put the widget in a form and compile it. It doesn't work. And to begin with where is the class if it is not there in kde core. Preview works very fine in qte-designer but make fails. What is the mismatch?

Awaiting an early reply
Hildebrand Victor