Error security issue 22

[Rene Ouderling]

I'm having the following problem:
I'm still using Kolab Server 2.1 and when i follow the instruction for 
security issue 22 i encounter the following error.

/kolab/bin/openpkg rpm --rebuild clamav-0.94-20080905.src.rpm
Installing clamav-0.94-20080905.src.rpm
error: Failed build dependencies:
        openpkg >= 20060823 is needed by clamav-0.94-20080905

Can anyone point me in the right direction to solve this problem, could not 
find a similar one in the archives

mvg/kind regards

Rene Ouderling