Texture Filtering Problem

Ive posted about this problem before and I thought I had it fixed but apparantly not. When I first turn my computer on and run my program it works fine no problems and my texturing looks like this. Then after having my computer on a while and running various other programs I go back to my program and it looks like this. It appears as though its no longer filtering the texture properly. I have filtering set up like this in my shader: sampler water_bump_texture = sampler_state { Texture = (water_bump_tex); MIPFILTER = NONE; MINFILTER = LINEAR; MAGFILTER = LINEAR; }; I dont have to do anything else to set up texture filtering do I? for example setting Device->setSamplerState maybe? surely thats just the same as doing it in the shader. Does anyone have any suggestions as to why this might be happening? Thanks