Constant flickering trees, flickering edges, very distracting please help!!!

[mithcol2]

I have spent hours and countless nights trying to fix this issue, if someone can help me out I will be extremely thankful, I love this game and really want to continue playing it but this constant flickering in the trees, grass, walls and shadows makes it difficult to keep playing this game! These screenshots should summarize some thigns about my computer. Im using a Dell Ultrasharm u2412. It is worse when Im moving around in game. My best guess is this is an anti-aliasing issue. It happens around the edges of my characters gear as well.

Thanks again to anyone who can help and please let me know if there is any other information that you need.

graphics card:





Settings set to maximum.






Im also using sweetFX because I heard it may help, it doesnt. These are the settings in sweetfx:
http://pastebin.ca/2494858