NL100: Straight on a paired board - No reads, Standard fold?

[crazyJohn]

Villain just sat down at the table and i've never played with him before, this is our first hand as he's in the big blind. Is this a standard fold here with no reads or should have i pushed at this level? Would have liked to call but am trying to tighten up after playing LAG at 6max the last few weeks and losing badly.

PokerStars No-Limit Hold'em, $1.00 BB (7 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP2 ($105.45)
CO ($99.90)
Button ($127.70)
Hero ($119.50)
BB ($100)
UTG ($94.15)
MP1 ($98.50)

Preflop: Hero is SB with 5[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/spade.gif[/img].
<font color="#666666">3 folds</font>, CO calls $1, <font color="#666666">1 fold</font>, Hero completes, BB checks.

Flop: ($3) 4[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, BB checks, CO checks.

Turn: ($3) 3[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets $2</font>, BB calls $2, CO folds.

River: ($7) 9[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $4</font>, <font color="#CC3333">BB raises to $97</font>, Hero folds.

Final Pot: $108

Results in white below: <font color="#FFFFFF">
BB doesn't show.
Outcome: BB wins $108. </font>