AIA Installer Prerequisites checking:
It's asking for packages that do not exist in RHEL5 repository.
Checking for openmotif21-2.1.30-11.RHEL4.4; openmotif21-2.1.30-11.EL5-i386. Failed <<<<
Checking for gnome-libs-1:126.96.36.199.90-44.1; Not found. Failed <<<<
Checking for xscreensaver-4.18-5.rhel4.2; Not found. Failed <<<<
As you can see, I have openmotif21-2.1.30-11.EL5-i386 installed (downloaded from Oracle).
Looks like it is checking against RHEL4 prerequisites, but this is RHEL5.