Update to KDE 3.5 fron Suse 9.3 fails with kpdf package

I use apt with synaptic to update my system. When I select the package: kdegraphics3-pdf: (kpdf) I get the following error: kdegraphics3-pdf: Benötigt: xpdf-tools but it is not installable So it requires 'xpdf-tools' which is not available. what is going wrong ? Matthias