XPDF Unexecutable - by: Sebastian Pigge

Hi,
I'm using Joomla 2.5.1 on a dedicated server running PHP 5.2.17, Apache Server.

I get following error:
*XPDF Binaries File
*Unexecutable
*CHMOD 0755
*Permission XPDF Binaries File: 0644 - Please set it to 0755 for binaries XPDF in LIN

What should I change to 755? I can't find a folder caled LIN.
Thanks