Hi John,
Could you post your installation logs from c:\program files\installjammer registry\uniflashv3 (program files (x86) if you're on a 64 bit machine). Please note the installjammer registry folder is hidden. Zip up the contents and attach here.
It looks like the installer's unable to get through the proxy/firewall to get to the site. You may need to download the offline installer. I can confirm that once I see your logs.
Thanks
Danish Innis