I edited your last post to remove the phone number as this is a public forum and anyone in the world can view it.
I did receive the other message that listed the number as well so I have it. If you are still getting the 500 error there is not much that I will be able to do with you until you can get the actual error to show. Do you have access to Firefox, or any other non IE browser? If so you should use one of these to ensure that it is not just something in IE that you are experiencing.
If you get the same result this indicates that your hosts has enabled a custom 500 level error page. You will need to contact your host to have them turn this off for you so that you can view the server side errors that are occurring. Once you get an error message it will be possible to debug what is occurring, until this though it would only be guessing as to what the problem may be. Please post back here with whatever result you get, if we need to continue this in a support ticket to exchange files I will open one up for you.