Can you see the device on the network after the TFTP (ie does ARP -a from a command window show the EZServe?). If yes, can you successfully ping the IP address?
You might try a hard reset AFTER the 1.60 TFTP recover. I had a similar but not identical problem where the FLASH0/data directory contained both 1.60 and 2.01 xml files. A hard reset solved that problem.