The installation tutorial on this page is a bit out-dated http://www.bailopan.net/csdm/index.php?page=install
but You need to only consider - the latest AMXMOD X needed for the latest CSDM 2.1.1 is 1.8.1 - the rest of description for 2.1 is OK- just follow it. Another thing - install Counter-Strike addon pack from here: http://www.amxmodx.org/downloads.php
(that maybe wasn't clearly written in the installation description for CSDM 2.1).
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The Fullpack of podbot mm V3B22 - 24 apr 2012!!! is available here. The All-In-One 3.2a package - 02 jun 2013 (AMX X 1.8.2 [with ATAC 3.0.1b , CSDM2.1.3c beta, CM OE 0.6.5, podbot mm V3B22c and mm 1.20) is available here. The newest Beta V3B23a (rel. 28 august 2018!!!) is available here.