My print is warping

Hello!

First off: I have a XYZPrinting Da Vinci Pro 1.0 3in1 printer.

Now - I'm all new to this awesome world of 3D printing, and I've only come to print a demoprint, a wrench and now a spool holder for my printer.

The problem actually started with the wrench, where the handle started warping a bit, and now also with the spool holder.

This is the spool holder I'm printing: http://www.thingiverse.com/thing:1234196

This is the problem: http://imgur.com/V456g7L

As I'm new to it all, I have no idea about what the problem could be. Too hot bed? Too fast print?

Hoping for replies, thanks!