I have a windows XP machine which I intend to join to the bincoin pool to mine. I would like to follow the basic instruction set and use Phoenix Miner. The site I prefer to use is bitcoinpool.com. I have a Video-339PCI-HLX Radeon HD 5450 512MB 64-bit card in the machine. I've followed the most basic instructions but the machine does not connect. I would like some guidance and help connecting and learning how to trouble shoot connecting issues.