I have a DP-G321 (dual)Wireless print server that I can not use with my R-300. I can however use it with the DP-G310 (single)print server. The D-Link site list the R-320 as acceptable for both Epson printers. My i9900 works with both PS. Anyone else have this problem? What could possibly be different between the USB data these two printers. D-Link customer service (India) was unable to help and could not refer me to additional help at D-Link. I can capture the USB data stream but have nothing to compare against and doubt the problem is correctable by modification of the USB data.