4serendipity - 12:17 am on Feb 16, 2012 (gmt 0)

I'm with the previous posters in thinking that you're either running into either a directory path or mime type issue.

Also, if you don't absolutely have to post the content in a text file, you could try creating a basic HTML template and pasting the content within a <pre> element. This would keep the door open to format the content down the road.