Hello, i recently changed out my Epson print head in my XP-950 with a genuine F09050 head (technically it should be compatible). The serial number is 31 digits long and the original is 33 long. it looks like i need to change this via the adjustment program, but the program is requiring a 33 digit number. i believe i have to tell the printer what i am using because, it goes through the cleaning cycle just before it prints, and just as it finishes the cycle the printer beeps then shuts down and restarts. any help would be great !!!