Blackhawk8

I have a dynojet wideband 2, hooked up to hptuners suit pro. It worked fine for two days, then when I hooked it up two days later the A/F would not read when I began scanning on hptuners. All the lights are on the wideband and when I calibrate the sensor the light flashs just how it should on the wideband. I have the purple wire in slot #1 and the white and purple wire in slot 5 which is correct. Just wondering if anyone had any idea as to what the problem could be?