[html-tidy] <none>

I have an xml file like 
<!-- edited with XML Spy v2.5 NT  - http://www.xmlspy.com -->
<?xml-stypesheet href="xxxxxxxxx" type="text/css"?>
<!DOCTYPE boCalculation SYSTEM "quote.dtd">
<!-- @version: 1.0-->
<abc>
   .
   .
   .
<abc>

When I try to use tidy to convert it to html using 

tidy -asxml sample.html

I get 


Tidy (vers 30th April 2000) Parsing "sample.html"
line 12 column 1 - Error: <bocalculation> is not recognized!
line 12 column 1 - Warning: missing </textarea> before <bocalculation>
line 12 column 1 - Warning: discarding unexpected <bocalculation>
line 13 column 6 - Error: <geninfo> is not recognized!
line 13 column 6 - Warning: discarding unexpected <geninfo>
line 14 column 10 - Error: <ctl_gst> is not recognized!
line 14 column 10 - Warning: discarding unexpected <ctl_gst>
line 14 column 22 - Warning: discarding unexpected </ctl_gst>
line 15 column 10 - Error: <ctl_pst> is not recognized!
line 15 column 10 - Warning: discarding unexpected <ctl_pst>
line 15 column 22 - Warning: discarding unexpected </ctl_pst>
line 16 column 10 - Error: <ca_payable> is not recognized!
line 16 column 10 - Warning: discarding unexpected <ca_payable>
line 16 column 22 - Warning: discarding unexpected </ca_payable>
line 17 column 10 - Error: <ca_mpayment> is not recognized!
line 17 column 10 - Warning: discarding unexpected <ca_mpayment>
line 17 column 22 - Warning: discarding unexpected </ca_mpayment>
line 18 column 10 - Error: <ca_term> is not recognized!

"sample.html" appears to be HTML 4.01 Transitional
291 warnings/errors were found!

This document has errors that must be fixed before
using HTML Tidy to generate a tidied up version.

Does it not do a straight conversion or am I doing something wrong?


Thanks for your help

Gouri Kulkarni