Cisco :: LMS 4.0 Evaluation Required

I'm running LMS 4.0 as an evaluation and I'm only discovering 86 devices, using the auto discovery. I've added a seed and although it sees lots of neighbours on that seed it only goes on to discover devices off a particular range. All the devices are set up the same way (standard config) so it should see them as well.
 
I know it has a limit on the number of managed devices of 100, and I could understand if it hit 100 and then stopped. We have around 500 devices in total (not including phones, DMPs, etc).
 
I've just added the seed and selected cdp as discovery method and set the snmp target as *.*.*.*. Is there anything else I should be doing?