Late to my own party!
Are you limping, or just calling open raises a lot? Either way, tighten up a bit on the calling front. Now, why aren't you opening for a raise very often? If you see a hand you like, open it up. Are you playing 2NL? Got AJs in MP? Make it at least 6c. You get me?
The sample size is too small to say anything much about winning at showdown, but it does look a little low, which might mean you're not folding when you're beat enough. But really, too small a sample to say.
So, open those hands up, make a cbet, keep betting when you have top pair, that sorta thing. At this stage it's all about value betting = making a bet that someone will call (or raise, but usually call) with a worse hand. Don't be scared, put some money in when you have a hand.
Have you posted any hands in the HA section (http://www.cardschat.com/f50/)? If not, get busy there, posting hands and also considering your responses to other hands that have been posted.