NPM 12 beta 4 and SAM 6.2 beta 3 issue

Hi All,

I did a fresh installation SAM 6.2 beta 3 and NPM 12 beta 4 on a test server (Win 2008 with MSSQL 2008). SAM installed first.

When I go to Node Details page, get error:

Unexpected Website Error

Could not load type 'SolarWinds.Orion.Core.Common.InformationService.SwisConnectionProxy' from assembly 'SolarWinds.Orion.Core.Common, Version=2015.1.1400.601, Culture=neutral, PublicKeyToken=null'.

I re-run the configuration, no help. Anyone has similar error? or any Solutions?  Or just SAM beta 3 and NPM beta 4 cannot install together? Thanks