I am working on a weapon and I have problems exporting it correctly from Gmax. When I export it, it wants to put it in P3D format, no other. I put it in that format, but changed the document to .jms after it was exported. Here is what I got in Tool:

###Ma5k
###ERROR model file has wrong version number
###ERROR failed to import geometry Ma5k.jms

Do I need a .jms exporter for Gmax?
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New problem;

05.24.08 08:40:34 tool pc 01.00.00.0609 ----------------------------------------------
05.24.08 08:40:34 reference function: _write_to_error_file
05.24.08 08:40:34 reference address: 42ca20
05.24.08 08:40:34 Couldn't read map file './toolbeta.map'
05.24.08 08:40:35 EAX: 0xFFFFFFFE
05.24.08 08:40:35 EBX: 0x0020F701
05.24.08 08:40:35 ECX: 0x0012F160
05.24.08 08:40:35 EDX: 0x000002CC
05.24.08 08:40:35 EDI: 0x0012F160
05.24.08 08:40:35 ESI: 0x00000000
05.24.08 08:40:35 EBP: 0x0012F038
05.24.08 08:40:35 ESP: 0x0012F028
05.24.08 08:40:35 EIP: 0x7C90EB94, C3 8D A4 24 ?????
05.24.08 08:40:35 EXCEPTION halt in .\intermediate_geometry.c,#444: triangle->material_index>=0 && triangle->material_index<old_material_count

I have a serious problem now, don't I?

no this isnt a problem at all. make sure you have a mutimaterial set up in max, then make sure its applied to the model, and make sure all of the model's material id's have a corresponding one in the multimaterial