Re: Please take my money!

From the screen shot it looks like your operating system is Windows 7 that you are using Internet Explorer as your browser. Correct?

I would try clearing the cache and cookies on the browser first. Here are the steps:

1. In the top right of the browser is a gear-wheel icon. Click on it.
2. From the context menu choose Internet options.
3. In the Internet Options dialog under browsing history click on the Delete... button.
4. Uncheck Preseverse Favorites website data and check Temporary Internet files and Cookies. Then click the Delete button.
5. Close and re-open Internet Explorer.

Does the Join process now work?

If not please try another browser such as Firefox or Chrome.