1st time ever i've seen this one. Thoughts?

PartyPoker (Cash Game): $0.10/$0.25 NL , 9 players
Sat Sep 22 23:50:48 VET 2007
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BN (18.5 bb's)
SB (103.4 bb's)
BB (170.1 bb's)
B6 (99 bb's)
B5 (19 bb's)
B4 (145.5 bb's)
Hero (132.2 bb's)
B2 (118.4 bb's)
B1 (17.2 bb's)

BN is the button.

Precards:
SB posts the small blind 0.4 bb's, BB posts the big blind 1 bb.

Preflop: Hero is dealt Qc Qh (9 active)
3 folds, Hero raises to 3.4 bb's, 4 folds, BB calls 2.4 bb's.

Flop: (7.2 bb's, 2 active)
BB checks, Hero bets 6 bb's, BB raises to 16 bb's, Hero calls 10 bb's.

Turn: (39.2 bb's, 2 active)
BB checks, Hero bets 27 bb's, BB raises to 54 bb's, Hero ????.



So, the moment I'm checkraised, I shouldn't bet the next street if villain check again? What is his possible range here, and why should I fold?