If you are using the current development branh of marlin that is a bad idea... ABL has been broken for a couple months now, they are working hard to fix it, along with a TON of bugs that are in previous versions...

I would suggest pulling up the 1.0.2 tag of the development version, ABL works on it for the most part and will print quite nicely... I test the development version of marlin every weekend and report problems... this is what i flash during the week to get prints done...