I'm guessing that it's wired wrong. Can't tell by the picture, but it's a pretty safe bet. Review your work.
As for your soldering, it appears you're feeding solder to the soldering iron, which will always win. The solder will melt, and then it doesn't know what to do so it forms into a ball and pouts. What you want is for the parts to be hot enough to melt solder. Then, then feed the solder into the joint, and it'll flow around nicely and make a good joint. Think of the soldering iron as a catalyst, not an active participant. It's just there to get the joint hot.