I have a problem with the following code, wich is a DTML methos that processes a form: <dtml-with REQUEST> (First, I check if the user has completed the txtCertificado field) <dtml-unless txtCertificado> <dtml-return "RESPONSE.redirect(URL1+'/InicioIC'+'?msg_error=Error: debe introducir un número de certificado')"> </dtml-unless> (Then, I lookup in a MySQL table with the method BuscaCertificado if a record with the value txtCertificado does already exists) <dtml-in BuscaCertificado> (if it is found, return with an error message) <dtml-if sequence-start> <dtml-return "RESPONSE.redirect(URL1+'/InicioIC'+'?msg_error=Error: el certificado '+txtCertificado+' ya existe')"> </dtml-if sequence-start> (and if not, go to IC page. This is the part that does not work) <dtml-return "RESPONSE.redirect(URL1+'/IC'+'?msg_error='+txtCertificado)"> </dtml-in> </dtml-with> The problem is that the program, though evaluates right the cases for nonexistent parameter or parameter already in the DB, it does not even reach the line: <dtml-return "RESPONSE.redirect(URL1+'/IC'+'?msg_error='+txtCertificado)"> Instead, it shows a blank page, with no code. There is no problem with this code, because I have tried changing it to show a simple message, and it doesn't work, too. Please, ¿could anyone tell me what I am doing wrong? Thanks in advance Borja Prieto Ursúa Alanta