fanfiction.net question (OT)

[Scott]

No: HPFGUIDX 8326

I want to upload the first chapter of a story that I've written on 
Fanfic.net but I have this feeling that it doesn't like me.  

I keep getting this message- 
"Upload aborted. The file you tried to upload was nither a html nor a 
text file. Please return to the previous screen and try again. 
Remember that your file must end in '.html', '.htm'. or '.txt'."

Help! Can anyone with more expericence uploading stories help me? I 
have used Word and saved it using html.  What else can I do???

Scott