I downloaded the Mod today. However, I edited the files faq.asp & Admin_faq.asp changing 'inc_top.asp' to 'inc_header.asp' and everything is now working.
You obviously downloaded an older version of the MOD for a previous Snitz version. I highly recommend that you download and install MOD: F.A.Q. Administration v1.1 for Snitz v3.4, which has the latest bug fixes and additional features.