firefox 1.6a1 and xforms.xpi from same nightly not compatible

All,

I downloaded the firefox-1.6a1.en-US.win32.zip from 
http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/2005-09-14-07-trunk/

and from the same directory went into the windows-xpi/ subdirectory and 
downloaded the xforms.xpi.  When I tried to install it into this build 
of firefox I got the following error message
"Mozilla XForms 0.2 could not be installed because it is not compatible 
with Dear Park 1.6a1. (Mozilla XForms 0.2 will only work with Deer Park 
versions from 1.0+ to 1.1)



Is there any way to bump the version number up so it will work?

Thanks!!