linux_base install error

[andrew at mediashell.org]

installing linux_base and get error:
/===>   linux_base-rh-7.3 depends on executable: rpm - found
Linux mode is not enabled.
Loading linux kernel module now...
kldload: can't load linux: Exec format error
The linux kernel module could not be loaded.
Please enable linux mode manually and retry.
/
I have already added an entry in rc.conf and am running generic kernel