rpm doesn't see a package (libaio) as installed, zypper does - why?

Hi,
the question is related to openSuSE 12.4 x64 and package management.
I am trying to solve missing package pre-requisites of Oracle 11g installation.
I had installed libaio with zypper but Oracle said that libaio was still missing - I checked rpm - it confirmed that libaio is missing.

Please see it in the picture: https://www.dropbox.com/s/0fx2pm1mbi...uSE_libaio.png



1. Why rpm and Oracle do not see package that is seen as installed by zypper?
2. How to install libaio in a way rpm and Oracle see them as installed.

Thanks!
Michal