Re programming transponder keys

Hi I have a 98 mx5 with one very worn working key, I. Have had new t5 transponder keys cut to code , and I was going to clone the original transponder using a newly purchased gambit mk2 programmer , but I cannot get this working on my PCs , for some reason it keeps telling me it cannot find the hardware , is there anyone out there who has a gambit programmer , who's had this issue or who may be able to help with port settings or hardware installation , failing that does anyone know where I can get my own keys programmed in Manchester UK , I don't want to send off my only working key in the post for obvious reasons !!