Routes not working sometime ?

[eluser]Unknown[/eluser]
Hi all,

I have a little question. I have the following code in my routes.php.

Code:

$route['default_controller'] = "photo";
$route['404_override'] = 'error';

$route['photo/:num'] = 'photo/index/$1';
$route['people/:num'] = 'people/index/$1';

The weird thing is, sometimes when I go to http://www.myurl.com/photo/1 it works and othertimes it redirects me to my error page.

Anyone maby has any idea what is wrong with my routes ?

Already thanks in advance!

Bob