truespace 3.2 exports to .x?? since when? I see the following..
TrueSpace v3.2 Features..
3D Export
VRML 1.0 - 2.0, DXF, ASC, CAN, RSD
3D Import
VRML 1.0, 3DS, ASC, PRJ, OBJ, LWO, LWB, IOB, GEO, EPS, AI, PS
.X is not listed as a supported file format. and if you meant .dxf DBPro cannot load those.
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TrueSpace v4 on the other hand shows this info..
3D Import
SCN, COB, SOB, WRL 1.0 , GZ, WRZ, DXF, 3DS, ASC, PRJ, LWO, OBJ, LWB, IOB, GEO, X
3D Export
SCN, COB, CAN, WRL 1.0 and 2.0, DXF, ASC, 3DS, X
Perhaps you got the versions wrong? or the .x support in v3.2 is undocumented.
Cheers!