We are using the Universal Device Poller (UDP) on Cisco ASA firewalls to pull stats including CurrentConnections and MaxConnections.
This in itself is working great and with a custom tab we have some views to show graphs of the data.
So within SolarWinds environment all is good. However when I attempt to query it, I find I am unable to restrict the data by date.

But without the date restriction it outputs data correctly:

I am doing a very similar query on other tables such as Orion.NPM.InterfaceTraffic, and Orion.VolumeUsageHistory and it works as expected.
The query is:
SELECT CPS.DateTime, CPS.Status, CPS.CustomPollerAssignmentID
FROM Orion.NPM.CustomPollerStatistics CPS
WHERE CPS.CustomPollerAssignmentID = '9b7d2e83-671b-40f1-9189-09f51c66670e'
AND CPS.DateTime > '11/03/2015 21:32:16'