MECANIM Problem>> UrGeNt HeLp <<needed

Animation
1

I downloaded a freely available character of mixamo [rigged] and i used it in mecanim, everything worked perfectly fine. Then i tried the other way round- i downloaded it, opened it in 3ds max, merged few polygons [means i selected a polygon and pressed ctrl+ backspace], and finally exported to fbx

while exporting to fbx i also got this error- The plug-in does not retain the orientation of Diagonals on Editable Poly objects. This could have an impact on modified UV coordinates. Refer to the Online Help for more information. The following objects are affected: -vincent_Casual_Male_Lod_1

but this time its not workin in mecanim, when i press the configure button, no green bones are seen, rather a red guy is seen, tried to set the bones manually but its not working

If you wish to check then i have uploaded both the characters here-
not-working.fbx- Free large file hosting. Send big files the easy way!
mixamo-vincent- Free large file hosting. Send big files the easy way!

2

Update- Referring to this post -

which in short says - Try converting your object to “Editable Mesh” rather than “Editable Poly”.

I did the same and while exporting , the error from 3ds max is gone but when i import it in unity i see this -

1366×768 213 KB

what do i do ??

where if i import the fbx as it is directly after downloading from mixamo site, then it looks like this -

1366×768 223 KB