Ocs Inventory agent returns empty IP address

Hi,

I recently updated ocsinventory-agent on a few servers running Red Hat 4.1.2. Updated ocsinventory-agent from version 1.3.1 to 2.4.1. Now all of these Red Hat server does not register their IP address on the OCS server. I receive "Empty IP Address". Did not have this problem when running version 1.3.1.
No issues on the other servers (all Debian 7 or above).

Please advise how to fix this issue.

Thank you.