I have had the same problem as you, but I was trying out a bad firmware, editing the STRINGID.BIN should be ok unless you edit it directly on the 60Mb partition itself.
These is another tool that can help too. called RK27DM, you can get it here
http://www.mp4nation.net/forum/viewt...hp?f=38&t=4840
I had to open my player to get the Rockusb driver installed, but if the "R" button is active on the RK27DM tool, then it means the driver is already installed so you wont need to open your player, what I did is posted here, just follow the thread:-
http://www.mympxplayer.org/3-vt10734.html?start=30
Good Luck