unarchive -> r00, r01, r02, rar

hazel is not able to unarchive:
file.r00
file.r01
file.r02
file.rar
the files are not corrupted. unrarX has no problem. all other kind of rar archives i tried worked fine.
there must be something special with this combination. is there a workaround, skript or fix possible ?
file.r00
file.r01
file.r02
file.rar
the files are not corrupted. unrarX has no problem. all other kind of rar archives i tried worked fine.
there must be something special with this combination. is there a workaround, skript or fix possible ?