Linda, try opening the .csv file in Excel (or Open Office). That will give you a spreadsheet of data. Note what 'Sheet' the data is on (tabs at the bottom), probably 'Sheet1'. Then, save that as an .XLS (standard spreadsheet extension) and close Excel. CSV files are not an Import file option.
Now, go to Import Data Wizard (not Import GPX File) and select your newly-created .xls file. It will prompt you for which sheet as per above, again probably 'Sheet1'. Then follow the steps taking care to assure that the column headings (especially latitude and longitude) are appropriately named and you should wind up with a mess of Pushpins.
As none of this is GPX, stay away from that function.