Bad quality of the sprite in Unity

Hello! I need to import a few sprites (background platform and sky) into my game scene but it seems that their quality after importing into Unity is too bad (they are blurred). The original resolution of this two images is big enough (2048 X 400 for background) and they are looking very nice in standard Windows image viewer. Here are the settings for these two textures:

maxSize = 2048 Format = truecolor TextureType = Sprite(2d)/nGUI FilterMode - point

I am using Unity2D 4.5 Target resolution of my project is 1280*800.

Can anyone help me to solve these problem?