Form not validating/ html4.01 Strict

I've got this bit in a page w/doctype html4.1 Strict:

"<form target="paypal" action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="on0" value="Size">Size&nbsp;<select name="os0"><option value="X-Small">X-Small</option>".

Validator returns this:

"Error  Line 74 column 12: required attribute "ACTION" not specified."
<form><input type="submit" name=//

But as you can see, "action" is there, and specified. Any ideas on what's going on? Same in HTML4.1 Loose.

:roll:
Thanks!
Wendy