I have just installed AUXtex and I follow the instruction on the manual very carefully, however, when I tried preview it shows an error icon instead of the preview image of the equation. What should I do to fix this?

I use: Emacs 23 Ghostscript 9.01 texlive ubuntu 11

My TEX code:

```
\documentclass{article}
\begin{document}
The solution to $\sqrt{x} = 5$ is $x=25$.
$A$
\end{document}
```

```
l.6 The solution to $
\sqrt{x} = 5$ is $x=25$.
Preview: Tightpage -32891 -32891 32891 32891
! Preview: Snippet 1 ended.(524466+157106x2122178).
<-><->
l.6 The solution to $\sqrt{x} = 5$
is $x=25$.
[1]
! Preview: Snippet 2 started.
<-><->
l.6 The solution to $\sqrt{x} = 5$ is $
x=25$.
! Preview: Snippet 2 ended.(422343+0x1903724).
<-><->
l.6 The solution to $\sqrt{x} = 5$ is $x=25$
.
[2]
! Preview: Snippet 3 started.
<-><->
l.8 $
A$
! Preview: Snippet 3 ended.(447828+0x491521).
<-><->
l.8 $A$
```

.... ....

```
Preview-DviPS finished at Fri Aug 12 22:52:32
Running `Preview-Ghostscript' with ``gs -dOutputFile\=\(_region_.prv/tmp10859AUf/pr1-\%d.pbm\) -q -dSAFER -dNOPAUSE -DNOPLATFONTS -dPrinted -dTextAlphaBits\=4 -dGraphicsAlphaBits\=4 -sDEVICE\=pnmraw -r94.3276x94.1294''
Preview-Ghostscript finished at Fri Aug 12 22:52:32
```