fold quads? unpossible
 

***** Hand History for Game 6409020340 *****
$200 USD NL Texas Hold'em - Saturday, October 13, 14:41:01 ET 2007
Table Table 125885 (Real Money)
Seat 1 is the button
Total number of players : 5
Seat 3: araujo122 ( $245.89 USD )
Seat 6: KOKAIS15 ( $280.35 USD )
Seat 5: fghtffyrdmns ( $385.15 USD )
Seat 1: Reina112 ( $105.50 USD )
Seat 2: sinysnap ( $112.60 USD )
sinysnap posts small blind [$1 USD].
araujo122 posts big blind [$2 USD].
** Dealing down cards **
Dealt to fghtffyrdmns [ 4c 4d ]
fghtffyrdmns raises [$7 USD]
KOKAIS15 folds
Reina112 calls [$7 USD]
sinysnap calls [$6 USD]
araujo122 folds
** Dealing Flop ** [ 9h, 4h, 9d ]
sinysnap checks
fghtffyrdmns bets [$16 USD]
Reina112 calls [$16 USD]
sinysnap folds
** Dealing Turn ** [ 4s ]
fghtffyrdmns bets [$34 USD]
Reina112 calls [$34 USD]
** Dealing River ** [ 9c ]
gang_up has joined the table.
fghtffyrdmns checks
Reina112 bets [$25 USD]
fghtffyrdmns calls [$25 USD]
Reina112 shows [ 5h, 3h ]a full house, Nines full of Fours.
fghtffyrdmns shows [ 4c, 4d ]four of a kind, Fours.
fghtffyrdmns wins $171 USD from the main pot with four of a kind, Fours.

Looks good mate.

Either
1) You got 1-outted
2) They have random pocket pr or something random

Number 2 is way more likely.

So why not reraise ?