Is this a bad call?

[deepsquat]

Is this a bad call with two ppl already in? It was for about 1/5 of my chips.

All feedback welcome!!

Thanks

Paradise Poker No-Limit Hold'em Tourney, Big Blind is t300 (6 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

Hero (t11270)
BB (t3000)
UTG (t18598)
MP (t3796)
CO (t2040)
Button (t22511)

Preflop: Hero is SB with A/images/graemlins/club.gif, Q/images/graemlins/spade.gif. Hero posts a blind of t300.
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises to t1200</font>, CO calls t1200, Button calls t1200, Hero (poster) calls t900.

Flop: (t4800) 2/images/graemlins/diamond.gif, A/images/graemlins/spade.gif, 3/images/graemlins/spade.gif <font color="#0000FF">(5 players)</font>
Hero checks, red$rebel checks, <font color="#CC3333">MP bets t2546</font>, CO calls t790, (All-In) folds, (2546)red$rebel folds.

I called also

Turn: (t8136) 7/images/graemlins/diamond.gif <font color="#0000FF">(3 players)</font>

River: (t8136) J/images/graemlins/heart.gif <font color="#0000FF">(3 players)</font>

Final Pot: t8136