I installed SP6 first and accidentally also installed the SP6 fix in wrong language. Thereafter I installed the new SP6a (with the fix included) for the correct language. Now the problem; IIS and perl-scripts is not working correctly cause of a bug in SP6. But since I installed SP6a over the other SP6 I don't think there is any easy way to get rid of it and instead install SP5. Or is there??? What happens if I try to install SP5 now?