Playing Multiple SNG on pokerstars

I am currently having trouble cashing out on my $3.40 10 person SNGS.
I have a bankroll of $400 and i play up to 4 tables of $3.40 at a time.
I've played about 15 games, and made the money 1/15 times in a time span of 2 days.
Im down to $359 and it seems i am losing a lot of money. Here is my play style:

Early: Tight only go in with premium hands
Middle: a bit loose
Late: Aggressive and if i am low stacked i tend to go all-in preflop.

1. Do i need to change my style of play?

2. Should i not be playing 4 tables at a time

3. I am usually good playing 1 table at a time, so maybe i should play $10 buy ins and play 1 table at a time?

4. What program is best for me to calculate my ROI and SNG stats.

Ok well lets see if I can answer your questions.
1. I need to see some of your hands from sngs in order to see if there are some leaks in your game or not, also You could go and watch my video on 2$ 9 man turbo sng, very similar to 3.40, that might help you.
2. To be honest I dont know if You are new to poker or not but when i was starting out I didnt feel comfortable playing more than 1 or 2 tables, but now i can 9 table sngs easily, because my desicions are pretty automatic. My suggestion is, if you dont feel like you are good enough, fast enough, not comfartable or cant pay attention to 4, maybe try 2 at a time?
3. I wouldnt suggest playing 10$ buy ins, You only have 32 buy ins, which in my opinions is bad br management, I like to have 50 or more buy ins personally. I think 5.50 sngs 1 or 2 at a time would be great.
4. There is sharkscope.com to track sngs, it keep tracks of sngs. Shows how many games you played/avg profit/roi/total profit/roi (return of investment) and it also shows yr status for example hot 3 cashes in a row or super tilt not itm 8 times in a row. This is just basic stuff. You get 5 free searches per day or you can subscribe and get more.
There are more programs that will give you better details than sharkscope, such as sngwiz, you can analyze your game and see more details etc etc. I believe there is a free trial for a month on sngwiz.com. There is also pokertracker but its mainly for cash games and tourneys, but you could check out pokertracker beta, i believe thats free too.

I bet the problem is that those are turbos, which is making the tourneys turn into luck fests earlier. I do exactly the same, but dont play the turbos (4-table STT SAGs). If you can win them one at a time, then try 2, then 3, until you get to the point that you are comfortable. (I 9 table cash games) If the problem isnt your play, then I assure you that the regular non-turbo SAGs will pay you off 100x as much, though they do take a bit longer to finish. As to the question about playing the $10 instead - if you can play 4 tables as well as one, you will make more money that way. If the problem is that you really can only play one, then definitely move up in stakes and focus all of your attention on that one table and you will still make money...