[Zope] zope not receiving POSTs from Apache

Hi And again there´s a weird behavior concerning Zope+Apache :) Well, I have successfully set up an Apache in a Solaris system with Zope configured behind it using the ProxyPass/Rewrite modules and SiteAccess Product method. It looked to work fine but then I realized that the forms are not submitting correctly. When I click a submit button it do goes to the correct page but no data is passed to it, it´s like there was no Post at all. Anyone knows something about this? Regards