It looks to me like your bed isn't level, that would be why it's sticking nicely on one side of the 1st layer and not on the other.
This is general stuff, so it might not all apply to your machine, but I think the best bet is to
1) level your gantry: I use a reference (in my case a piece of plexiglass) that I lower the gantry down to, and then spin the threaded rods by hand until both sides are even with my reference.
2) level your bed: bring your extruder down to the bed, and stop it approx 0.1mm (about the thickness of a piece of paper) from the front left corner. Then move to the back right, and adjust your bed to 0.1mm. Repeat on the final two corners, and that should set it pretty nicely.
3) make sure your extruder is calibrated. I like this Slic3r calibration guide:
http://richrap.blogspot.ca/2012/01/slic ... s-and.html