Can anyone out there help me. I have a brother 3100c. I ran out of black ink and went to change cartridge. the cartidge wont slide over to change. I have called brother but they dont know what the problem is. this printer is about 18 months old so they said my 1 yr warranty is up. I dont know what to do. I have unplug trying to get it to reset nothing works. I am hoping someone has had this problem and can give me some advice.