Bootcamp won't work, Keep trying everything!!!

so i've been trying install windows 7 ultimate on macbook pro 15" 2011 running os x lion 10.7.3 , there's been no luck! every time go bootcamp assistant , try make partition windows works minute , pops saying

the disk cannot partitioned because files cannot moved.

disk , use disk utility format single mac os extended (journaled) volume. restore information disk , try using boot camp assistant again.

i've tried lot of things repairing disk, using idefrag, making own fat partition fails, , doing full restore snow leopard lion using sl disk. did loose harddrive space @ 1 point , happened delete recovery hd see if fix problem, didn't, reinstalled os x lion app store , have harddrive space , recovery hd... i'm stuck , have been trying , trying days fix this, there's no luck please help, thanks!

 

you tried lot, didn't said - way avoid error.

 

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