Problems with static mesh import.

[LeighT]

Hello everyone!
I'am trying to convert piece of my car model into udk(before making full UV and maps), but there is a problem that i can't solve in a few days already.
In 3dsmax normal map looks fine, but when imported in UDK i've got somethin like that:
http://s019.radikal.ru/i618/1204/78/09bc93787d0f.jpg
Low's topology:
http://s019.radikal.ru/i611/1204/e6/6df17b9b3d01.jpg
So i increased and fixed topology(only "squares" now), added polygons and now geometry looks pretty nice(More than enough polys for correct NM):
http://s016.radikal.ru/i337/1204/da/f03297bb92d7.jpg
But my problem is still there.Now i have less artifacts but...NM still doenst works correctly:
http://s019.radikal.ru/i615/1204/e3/bede444c4cbe.jpg
Changing NM 2D texture properties, smothing groups etc didnt gave me anything.I also made 2nd UV channel for lighmap, but nothing new.
I have no idea - in 3ds even with bad base topology model looks fine.
Maybe its too simle so i cant see it
BTW i would be happy for any help.Thanx.

[darthviper107]

Make sure you have smoothing groups applied. Also that your normal map is imported with normal map compression, also that your normal map was created when your model has proper smoothing groups applied.

[LeighT]

Yes, i checked this before. =/
I rendered NM map when lowpoly model was with only one smooth group(all polys in), as usual(other way NM would be incorrect even with 3dmax render).
Mesh imported in udk has the only SG too. I didin't change anything after finished my work in topogun and set one sg at all.
Normal map compression is set to "tc_normalmap"(but, this doesnt change a lot if wrong, like i examined), i tried different compressions and blending options - no result.
Before increasing polycount, model looked terrible, like with smoothing groups only(but there was some projected details - so NM partially worked).