Strange situation when saving a file

Hi all, I'm using ob_start() in order to save the content of a web page into a variable string and then save it into a file in the file system. Every thing is done OK. The only workaround I'm doing is adding a .doc file extension when saving the file, in order to open the file in Word. Once the file has been created and saved as I doc file (not a doc format!), I e-mail it! When the client gets the e-mail, he/she should open the file either by saving the file to the local system or openning the file directly from the e-mail attachment. Either way, I got a blank page in Word. If I open the document directly from the web server, without having it sent by e-mail, it opens correctly in Word. The only problem is when the file is been emailed!!! What could be going wrong?? Any ideas?? Thanks in advance!! ----------------------- Miguel Guirao Aguilera Logistica R8 TELCEL Tel. (999) 960.7994 Este mensaje es exclusivamente para el uso de la persona o entidad a quien esta dirigido; contiene informacion estrictamente confidencial y legalmente protegida, cuya divulgacion es sancionada por la ley. Si el lector de este mensaje no es a quien esta dirigido, ni se trata del empleado o agente responsable de esta informacion, se le notifica por medio del presente, que su reproduccion y distribucion, esta estrictamente prohibida. Si Usted recibio este comunicado por error, favor de notificarlo inmediatamente al remitente y destruir el mensaje. Todas las opiniones contenidas en este mail son propias del autor del mensaje y no necesariamente coinciden con las de Radiomovil Dipsa, S.A. de C.V. o alguna de sus empresas controladas, controladoras, afiliadas y subsidiarias. Este mensaje intencionalmente no contiene acentos. This message is for the sole use of the person or entity to whom it is being sent. Therefore, it contains strictly confidential and legally protected material whose disclosure is subject to penalty by law. If the person reading this message is not the one to whom it is being sent and/or is not an employee or the responsible agent for this information, this person is herein notified that any unauthorized dissemination, distribution or copying of the materials included in this facsimile is strictly prohibited. If you received this document by mistake please notify immediately to the subscriber and destroy the message. Any opinions contained in this e-mail are those of the author of the message and do not necessarily coincide with those of Radiomovil Dipsa, S.A. de C.V. or any of its control, controlled, affiliates and subsidiaries companies. No part of this message or attachments may be used or reproduced in any manner whatsoever.