All without admin, 32 bit nest trader, amibroker and rtd1.6 was working. After installing and uninstalling, 64 bit nesttrader, I started without admin, 32 bit nest trader, amibroker and rtd1.6. Now rtd is not working. I get message "unable to connect to application. waiting". Backfill works. In admn mode for all programs, rtd works.