Which flash file goes with which FIA file??? invalid model descriptor

[JeeBoy]

Hi.

I've got a 3510 and I have a lot diffrent of flashfile versions for it. Bur everytime I try to flash I get the "model descriptor" error. I've read that this comes up when the wrong FIA files are used. My question is how do I know which flashfileversion goes with which FIA?? How can I see which files works?? I've tried a lot of diffrent versions like 3.34 3.36 3.37 and some new ones with different sort of FIA files but still I get the "invalid model descriptor". Please anyone help me.

Thanxxx