why does the game crash when i load this creature into the toolset

[Legacy_ZugothNDeadly]

               

here are the links for the 2da and mdl file in case you need to check it:

 

http://www.mediafire.../appearance.2da

 

http://www.mediafire.../c_talbukbl.mdl

 

 

 

and i did stl check it and everything went fine

               
               

               
            

[Legacy_OldMansBeard]

               

Because your skinmesh has too many bones. More than 21 bones crashes the toolset (and more than 24 crashes the game).

 

Here's what CM352d makes of your model:

c_talbukbl.mdl loaded.
  skinmesh talbukblue re-aligned to origin
  skinmesh talbukblue re-pivoted to origin
  *** Error *** more than 21 bones in talbukblue
  vertices welded in [talbukblue]
  duplicate face(s) deleted from talbukblue
  unused tverts deleted from [talbukblue]
  tverts welded in [talbukblue]
  Fixes made = 19274
*** Cannot output model - too buggy ***

Try cutting the skin into separate pieces, so that each piece has <21 of the bones.