caryn, I have been informed by Jon that you are still having trouble with this. I would like to help you out. When I visit the admin section I get a blank white page, this indicates that there is a php error occurring on the page. Please try adding in this code to the admin index page so that the error can be known:
Once the error is known we can work to resolve it, if the problem is not one that you understand or can easily fix I would like to open a ticket for you so I can help you get this worked out. Please post back and let us know the result, I will be looking for your response.