If you operate a private label version of Collective2, the latest build (6077) of StrategyXtender now supports "platform IDs", which are required to access and trade private label platforms via the C2 api.
Simply download and install the latest version of StrategyXtender, update your Collective2 settings with your PlatformID, and restart the StrategyXtender service. Your private label systems should now be visible in the StrategyXtender Dashboard.