Error message

Notice: Use of undefined constant RADIOACTIVITY_FIELD_TYPE - assumed 'RADIOACTIVITY_FIELD_TYPE' in radioactivity_field_schema() (line 9 of /srv/www/lcom_www/sites/all/modules/contrib/radioactivity/radioactivity.install).
June 14, 2014

why can't install anything after downloading it. I tried with adobe flash player and avast, neither will install!!!!please help! I want to play my game, lol

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