Does someone know why biblatex and listings are incompatible and if there is a way to fix it?

I have a Lyx document and whenever I insert program listings I get errors like:

```
 al trabajo de \citet{Fernandez2007}.
                                           Más adelante se describe la
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

```

or like

```
 \printbibliography\newpage
                             {}
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

```

This happens only when I add the use of package listings.

I am including biblatex like this:

```
\usepackage[natbib=true,style=alphabetic-verb,sorting=nty,hyperref,backend=bibtex8]{biblatex}

```

Any help will be very much appreciated.

Bests,

B.

**Edit** (more details): Since I've been asked an example, I actually don't have one. Because all I have to do is adding:

```
\usepackage{listings}

```

to my Latex preamble (I am using Lyx) to get these errors. I have not even inserted source code listings yet.

If I insert a source code listing using Lyx menu I will have the same problem since Lyx currently uses listings package and it will automatically insert listings package in the preamble.

This is really strange, because I don't see why when I insert listings that would undefine \citet or other commands. I just upgraded from Lyx 1.6.8 to Lyx 2.0.0 to see if this fixed something, but no. I also updated the MikTex packages but it does not fix anything.