I'm getting the same problem. I set SQLPSX on my XP machine to test it and everything worked fine.

I've now done the same setup process on Windows Server 2008 and after running Librarysmo.ps1 if I type the Get-Command *et-SQL* I get no results.

the only differences on the Server are that it is running Powershell V2 (CTP3) and is x64