My assignment is asking me to...

In the Data Source Configuration Wizard dialog, choose the DataSet option and then click the Next button. Which I did..Then it says..

Check the checkbox next to Tables and then click the Finish button. This will create a default dataset named HangmanDBDataSet with the Units and Words data tables.

So the objects come up but when I go to click on what objects I want to add it doesnt stick...when I go to add them it says No database objects have been selected

Why isnt it letting me add them??