Hello, I have a da Vinci 2.0A Duo and I am trying to print this http://www.thingiverse.com/thing:292041 . When it prints some of the corners start to peel and it gradually gets worse and worse. What are some ways to fix this?

Things to know:
*I have kapton tape on the print bed
*I have tried using a raft (raft peels too)
*I am printing with ABS
*I am slicing on XYZWare (I want to use Slic3r but can't figure it out)


I feel that the problem is the heated bed is only reaching 70 degrees Celsius before the printer says it's good to start printing, but XYZWare does not allow for a higher temperature.