Are you saying as well as the FIS not displaying, the car fires up and dies?
If so you need to code the transponders in your remotes to the new cluster, this is not a job most can do; there are a few on here that can do it. I'd get that sorted before the Polar FIS, but when I upgraded to colour clocks, I put the FIS in update mode before and then updated after the cluster was fitted and it just worked.
Maybe the FIS is an issue with your loom that you used to convert the cluster wiring from 36 pin to 32 pin?
Good luck
Stu