You will need to upgrade MRTG to at least 2.9.22 (Current version is 2.15.1).

From the CHANGELOG: 

Changes 2.9.22
--------------
From: Tobi
* removed VERSION for ISA arry in MRTG_lib.pm ... it has no reason to be
  there, and perl 5.8 complains

     "Choose a job you like and you will never have to work a day of your life" - Confucius

In reply to Re: problem: "can't locate package $VERSION" by NetWallah
in thread problem: "can't locate package $VERSION" by shriken

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