I can't seem to find the right SN for my printer to transfer the pro from one PC to another. I have un bound from the old PC and when I try to bind to the new PC it says the SN or licence Number isn't correct. I copy and pasted the License number so I know that's right. I've tried every SN on My Mars3 and it still tells me the SN or License Number is wrong. This is very frustrating to say the very least.