Cannot open file because the current provider (SqlServer) cannot open a file.

Server has SQL 2012Opened powershellsqlps got PS SQLSERVER:\> promptPS SQLSERVER:\> echo "xxxx" > tempps.txt[b]This works fine in normal powershell[/b]. In sqlps I get error:Cannot open file because the current provider (SqlServer) cannot open a file.Well, I must have left out a step. Can somebody tell me how to get sqlps permission to open a file?