SSH2 connection failing on certain devices in NCM.

Recently I have been trying to have all of my running/startup configs downloaded via the NCM so that I may use SolarWinds to help with STIGs in the near future. I have 216 devices total and while the majority of them download fine, the process fails on 25 of them. They are all using the same profile to log in and I have verified with Putty that the account works on all the devices. When running the test feature, I get the error "Test Failed. Connection Refused by x.x.x.x"; the x's being the node itself. Showing "credential login details" gives the following: ----- Connection Profile: SolarWinds ----- Device Template: Cisco IOS. Any thoughts on why this may be occuring? Thank you!