Can't add additional poller

Hi, We are trying to add an additional poller.

I use the file: SolarWinds-SAM-v6.2-Poller.exe dated 2/17/2015 7:49 PM

I can connect to our main Orion server, but it comes back with the below message:

The components installed on your main polling engine are newer than the version included in this installation package:

Server Application Monitor V6.2.0

Individually updgrade all components above to their latest available version on this polling engine.

OrionPlatform-2015.1-HotFix4.zip and SAM-v6.2-HotFix1.zip has been applied to the main Orion server.

Any ideas what might be preventing us from adding the additional poller?

Thanks Martin