Problems in the apex

Hi
I am trying to build a model of fabric, but because of problems would not come into existence to make
Steps
I am designing a fabric in a blender or, for example, a flag
It’s apex in software and files I produce my nvidia.
And FBX file to my project
And then I add the file to the apex
But everything happens without errors, but when I model drawn Planning fabric apex file
And the basic shape loses himself
please guide me
Nvidia is true even in the stages and the like carry out all works well, but not engine
I am waiting for your answer

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admin PLS support me

If I do not leave the engine