Not all MIB's from CPT 600 listed in "List Resources"

I'm new to Solarwinds.  Has anyone had a problem with getting the Cisco CPT 600 to list all the resources available?

I run the MIB Walk and get a list of about 8000 MIB's, but when I run the List Resources on the same device in Solarwinds, it only list 140.

I have about 20 interfaces on the connected CPT 50's that I need to monitor, and they are all listed in the MIB Walk, but none are in the 140 listed in Solarwinds.

Any suggestions would be helpful.