Advice needed

I need advice.

Over the past two days (9 hours playing time total), I have lost over 100BB at 3-6 Limit games on a Party skin site. I need help in identifying what is happening. Some background:

I play two tables at a time and have no problem managing the action between them (two monitors).

In these particular sessions, I put money in the pot 19-20%, my pre-flop raise average was 9-10%, and my post-flop aggression was right at 4% (these were provided by PokerTracker over the 1200+ hands it recorded during this time.)

My starting hands are well in line with any published set, including Abdul's, Skansky's, and Jone's. I do not chase inside straights, I drop the hand at the flop if I don't hit, and don't hold on to AK if I don't hit.

Over these sessions at Party, I was drawn out on repeatedly, with no indication, i.e.: no raising, re-raising. Top pair, top kicker gets busted by a miracle river; full house beat by bigger full house.

But, mostly the loss was due to playing good starting hands aggressively and then not having the flop or turn improve. I spent about two hours this afternoon going through the sessions and hands in PokerTracker, looking for leaks in my game. What I found was that most - the vast majority - of the hands I lost money on were due to missed flops or drawouts. (I am not saying I played every hand perfectly, but I was very surprised to have PokerTracker verify what I was seeing/feeling during these sessions.

I am at a loss in trying to figure out how I'm supposed to play when hand after hand - remember, this is over 1200+ hands - brings missed flops and/or drawouts. My bankroll took a huge hit and I am now forced to move down in limits.

I could have quit playing earlier, but my playing was not bad - I was not tilting and was very much in control of what I was doing, i.e.: hand selection, aggression, and dropping hands when it was time. But over the nine hours of play, my stack just slowly disappeared, drained by blinds, rake, missed flops and drawouts.

I look at the hands (in PokerTracker) that winning players have played and I just don't see what they are doing that I am not. Hand selection, aggression, etc. are very similar.

So, I am seeking some advice from the experienced among you. This is quite frustrating; I'm trying to build, but several sessions like these have caused me to question whether this is going to be possible.

Another point to consider: I am a winning player at my local casino in Limit games from 2-4 to 10-20. The play there is NOTHING like what I experience online. Most 2-4 players at the casino drop hands that the online folks draw out on.

How do you post winning numbers from situations like this?

Thanks.