Cannot add "Opportunity Needs" to a posted Opportunity

I cannot find a way to edit the "Opportunity Needs". I have successfully posted an opportunity, but when I edit & try to click on "Add First Need" under "What (or who) do you need for this opportunity?", it just refreshes the screen & shows me my opportunity without the edit links.

I am using IE 8.0 on Windows XP. I have also disabled my pop up blocker, but that didn't have any affect.

Please let me know how to update this so that I can list specifically where we need help. Thanks!