ok i just finished my model in z brush , but i have a problem , ok u guess it , how to apply my normal maps on a low res model to have the same effect , i thaught that the problem is in my model or normal map setting but my friend apply it in maya , and voala , everything is right , i need the same result but in 3d max , pllllz help me ASAP:( 
Asking someone to do something for you ASAP isn’t usually the way to go. If I have to hurry to help you, and I don’t actually receive anything for it then the chances of getting a reply drop significantly.
Just an FYI.
Anyway, you probably have to flip your green channel of your map. This can be done in photoshop or max. You can also generate a new map with a flipped green channel inside of zbrush as well.
first of all thanks for ur replay , sec i really needed the help so soon thats why i said ASAP , i didnt mean anything bad to anyone , any way thnx again very much for ur help , but thier is something strange , when i use the same map in maya as i said all the details is thier but still after i flipped the green still the same problem , PS : i modeled the base mesh in z brush using z spheres , is this a problem , do i have to export the model in some certian way , thnx againg for replaying for the first time and sorry f u misundersatnd my ASAP , promise wont use it again 
I understand you wanting help soon. But waiting on due dates, etc, isn’t my concern.
Anyway, without images of the problem you’re having in Max I can’t really help you.
Texture?
Max view
Maya view
UVs
Mesh?
etc.
If you can provide images of the problem, the community can probably come up with a solution.