Codecompletion Activation

[Per Edin]

Hi!

For a few days ago i installed KDevelop 2.0. Before that i read some
mails from the kdevelop devel mailing list with the subject "codecompletion's 
problem". Hmm, nice function, like in Visual C++. But how do i activate it?
Is my version to old or shall i compile it with a certain flag?

Some information:
Distro: Red Hat 7.1
KDE: 2.2.2
Qt: 2.3.0
Kdevelop: 2.0.2