[Zope] Error HTTP 500 using XUF in 2.6.0

Hi all, I'm trying to use exUserFolder in Zope 2.6.0 without success. Every time I authentificate incorrectly my browser (IE 6.0) raises a HTTP 500 error and if I authentificate correctly it works well. Using the same objects in 2.5.1 it works as expected (in my example it redirects me to the login screen). Anybody knows the reason for this behaviour (HTTP 500 error)? Here is the example: This is the docLogin in my XUF ------------------------------------------------------------------- <dtml-if authFailedCode> <dtml-call "RESPONSE.redirect(URL1 + '/auth_failed/index_html')"> <dtml-else> The HTML of the login page goes here </dtml-if> ------------------------------------------------------------------- Thanks, Axier Garcia