he means that counterstrike.com purchased servers have a protection so you can't upload any .dll files, so you have to do what chuck or darkshadow said below
if you have counter-strike.com server, open a support ticket and ask if they can install wcsmod for you. Unlike other gameserver companies they will install it for you
I want to add wcs to my server but i need es_tools and mattiescrps...when i try uploading them to my counter_strike.com bought server its not accepting es_tools.dll and mattiescrips.dll