Problems downloading files from site

Hello, this is my first post.
Some of my visitors experience problems downloading pdf-files from my homepage.
The error message looks like this

Error 403: Forbidden
You don’t have permissions to access this page. This usually means one of the following:

this file and directory permissions make them unavailable from the Internet.
.htaccess contains instructions that prevent public access to this file or directory.
Please check file and directory permissions and .htaccess configuration if you are able to do this. Otherwise, request your webmaster to grant you access.

Here is the link:
http://brfrodakvarn.se/wp-content/uploads/2011/07/stadgar1.pdf
I myself have no problem downloading the pdf-file and only some visitors seem to have this problem. I’ve removed the file and uploaded it again to see if there was any improvemed but the problem remains the same.