Odds are it is not your fault. The site is likely under a Distributed Denial of Service attack.
Unfortunately, these happen from time to time and cause big problems for online businesses. However, before you assume this is the case, it would behoove you to read our Quick Fix to Common Poker Problems Guide and do a full uninstall, reinstall, and clean up of your poker client and PC. The worst thing that can happen is it doesn't work but your PC runs more smoothly for everything else you do!