Infocube Data Loading

I am new to SAP and am beginning from the beginning, populating an Infocube with historical data to be used for personal practice. I have downloaded excel data from an infocube, made some changes, added some new information and now am trying to upload the new information into an Infocube. I know this is pretty basic, but as I said i´ve just started learning. I have created a datasource, done a tranformation to an infosource, done another transformation to the infocube, but when I go to complete the data transfer I get an error message saying that the

source is not remote enabled

Thank you so much and I hope someday to be able to help on this site.......wishful thinking!

Steve