Can you check if this helps: 4. Adobe Download Assistant installs and opens, but the download doesn't start. Under certain conditions, Adobe Download Assistant installs but does not immediately start downloading the trial product. If that happens, refresh the Adobe.com trial download page in your browser and then click the Download Now button again. There are other solutions in this doc: http://kb2.adobe.com/cps/898/cpsid_89867.html. If this still doesn't help, I'll ask someone from customer support to reply.
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