SSH and tight low limit games.

I have had similar concerns about what type of games the advice in SSHE applies to. I'm quite new to poker and I'm currently playing a lot at NobelPoker, usually 1-2$ limit. There, the 10-handed tables are quite tight (20-30% flop) so I find myself playing a lot at the six-handed tables (50-70% flop). Problem is that I'm doing quite miserably at these tables, even though I think I grasp and follow the concepts in SSHE. Usually, I find that the super-aggressive players win the most! Instead, I win when I enter the tight 10-handed tables. What can I be doing wrong at 6-h? Is the advice is SSHE so dependent on 10-h games? If so, how should I adjust my game (the advice in SSHE) to fit 6-h?