Elamite, from Dravidian? Hmm... I don't believe that what is known of Elamite indicates that it is agglutinative, which Dravidian is. From the link I (think I) posted before...
"Unlike their Mesopotamian neighbors which had more than 700 signs, the Elamite cuneiform only contained 145 signs, where 113 were syllabograms, twenty five were logograms, and seven were determinatives."
This is kinda cool...
http://www.sil.org/linguistics/GlossaryOfLinguisticTerms/WhatIsAnAgglutinativeLanguage.htm
That's what I have read. Elamite is agglutinative from what I have read. Elamite is an language isolate like Ainu, Basque, Sumerian, and Etruscan.