You need to first select the first version of the test you want to compare. Then at the top of the page, you will see a box appear listing the test you selected. There will also be an instruction to select the second version of the test that you want to be compared to the first test selected. You must give the program a moment or two to post this instruction and then you can select the second test and then wait a moment or two and then click on View Results. The reason for the wait time is to give the program a moment or two to process your requests. Also, be certain you can see the top of the page to view the box with the instructions.