Failed to lookup OID for BIGIP F5 device

I have setup hyperic and added an f5 device. Under Inventory > Configuration properties it gives the error:

This resource is turned off or has not been configured properly.

The problem is: Invalid configuration: Invalid request: Failed to lookup OID for name=sysHttpStatNumberReqs (last lookup failure=null)

I have added F5-BIGIP-SYSTEM-MIB.txt, F5-BIGIP-GLOBAL-MIB.txt and F5-BIGIP-LOCAL-MIB.txt to /usr/share/snmp/mibs. I then ran export MIBS=ALL

When running snmpwalk -v 2c -c community IP 1.3.6.1.4.1.3375.2.1.1.2.4.7 I get the errors:

Cannot adopt OID in F5-BIGIP-SYSTEM-MIB:

When running snmptranslate sysHttpStatNumberReqs I also get the same errors

Any help will be greatly appreciated.