HAAAALPPPPP! Switching out springs.

Okay guys so I got the strut out and put the spring compressors on but I cannot get the top bolt holding everything together off. It's the single nut holding the top of the strut together.

It's the last piece standing between me and being done with this strut. But I can't get the bitch off. Tried it with a breaker bar and everything. Any suggestions? As always any help is appreciated.

Thanks guys.