.asp Not Recognized: 500 - Internal server error

I recently switched some pages (all of poetry-lyrics and writings) from .html to .asp. I needed to add a footer and header include. So I have changed the file type, and added the new .txt includes for all the pages. Now When i click them they all say 500 - Internal server error.

Live Example: http://www.jasontanzer.com/poetry-lyrics.asp (click any link)

What does this mean? As far as I see, they should开发者_如何学Python be working fine. Anyone see anything wrong here? Thanks Very Much.

James

@KemoSabe: Your includes should look like this within yourfile.asp:

<!-- #include file="header.txt" -->
Your content
<!-- #include file="footer.txt" -->

Since your site is hosted on IIS7, I suggest you have a look at this site as well for other common issues: http://blogs.iis.net/bills/archive/2007/05/21/tips-for-classic-asp-developers-on-iis7.aspx