[Zope-dev] Unexpected result

Hi I try to validate a formulator object with a python script If an error was submitted the python script would acquire again the zope page template that render the formulator with the error messages My problem is than when I try to return the ZPT render Zope process the return and convert <, > and & to the < > and & I try to conver these codes, change the content-type and so on but the problem persists How can I solve these question? TIA