1. Reduce your bed temperature. I target 100C for ABS (some claim this is too high). I wouldn't go over 110.
2. May want to increase your nozzle temp to 230, depending on brand of ABS you are using.
3. Switch to a different slicer - ReplicatorG hasn't been updated since 2012. Use slic3r, cura, or simplify 3d

If the above items don't fix the issue, check your bed is level. Make sure to level it when hot.

Also, this board has a Flashforge specific section. I recommend posting there in the future.