I have created a template for the 500 HTTP error.

I have inserted my template `500.html` in:

1. /project/
2. /project/templates/
3. /python2.5/
4. /python2.5/templates/

but I always get this error:

```
TemplateDoesNotExist: 500.html

```

I get the same problem for an HTTP 404 error.

Why?