sensor valve on laguna?

one tyre has no sensor valve fitted other three have.Took out fuse waited as instructed, still have same problem warning tyre signal still coming on on all three tyres .Is this because I have one standard valve on one tyre and sensors valves on all other three.if I was to get sensor valve put on forth tyre would this solve the problem or would I be better getting all standard valves fitting please help.Thanks.