How to protect text

[barona, hugo]

I am writing a book about freeswitch. I need to explain how is the 
structure of this soft switch that uses xml files that are parsed for 
xml parser. But when I write a sentence like: . Etiquetas con 
auto-cierre: <alguna cosa/>tal como <X-PRE-PROCESS cmd="set" 
data="default_password=1234"/>. Este tipo de etiqueta es típico para 
órdenes de ejecución que se realizan en forma inmediata tales como los 
comandos.

Lyx give me an error message like:
                               */..tal como <X-PRE-PROCESS
                               cmd=\textquotedbl/*

                               */{}set\textquotedbl{}/*

                               */Your command was ignored./*

                               */Type I <command> <return> to replace
                               it with another command,/*

                               */or <return> to continue without it./*

                               */
                               Latex error: command \textquotedbl
                               unavailable in encoding OT1/*


How can I surround my text and do not get an error message?


thanks


hugo