You need a fine point solder.
http://www.radioshack.com/product.as...t%5Fid=64-2051
Evertime try to soldering on the board, dont take more than 3 seconds.
Make sure you soldering right, double check is there anywhere missed soldering, i.e. soldering other pin together.
JUST BECAREFUL!!! Follow the INSTALL INSTRUCTION GUIDE