Hi Karen,
Please try again with the following steps:
1.Open SAP
2.Go To Tools > Queries > Query Generator
3.Click on "Execute"
Query Preview is displayed.
4.Click on "Display Query Structure"
5.Paste your Query there and Click Execute.
Check whether the Query result is displayed.
6.Now in order to export to spread sheet click on MS-Excel button.
7.Save As "Microsoft Excel File".