Problem wuth Schedule Refresh using OErsonal Gateway

Hi All,

I created a Power BI report accessing On - Premises SQL Server Data Base.

I published on PowerBi Services, and everything was ok until I create a schedule refresh. After that I can't see anymore the report`s data. Besides when I click into the data set this error appears:

"This dataset contains on-premises data sources. To schedule data refresh, try Power BI Pro for 60.00 days, or contact your Office 365 tenant administrator to purchase Power BI Pro. Learn more about data sources that currently support refresh."

I Have a free Power BI acount and I`m using a personal Gateway ( Connected and good to go !)

As We Can see in the PowerBi's documentation, I thought it was able to schedule a refresh :

Data Refresh                                     Power BI (free)                     Power BI Pro
Datasets scheduled to refresh          Daily                                     Hourly*

https://powerbi.microsoft.com/en-us/documentation/powerbi-refresh-data/

Does Anyone Can Help me?