You seem to have had some SERIOUS connection issues, and/or not that great a hash-rate(?).
With about 1.7Ghash/s, i submitted 4743 shares in round #18282, 5782 shares in #18283 and 7264 shares in #18284. The rewards were normal (considering the pool hash-rate, and the difficulty), in the region of 0.0038-0.0042btc per round.
The way Slush's scoring system works is, the more recent the submitted shares, the more they're worth. Which is to say, if you submit, say, 2000 shares at the beginning of a 3h round, and then your 'net connection fails or something, you won't get much (if anything) as a reward. This is meant as a pool-hopping deterrent. On the other hand, if you DO reconnect a while before the round happens to end, you CAN get back up to speed in minutes
If i got an average of 0.004btc for the 4-6k shares submitted in ~3h, you shouldn't be surprised you got zilch for ~100 shares submitted in the same time :/