Small PP allin pre-flop

[TylerSoapCO]

Full Tilt Poker - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 5 Players - (LegoPoker Hand History Converter)

SB: $52.30
BB: $100.55
UTG: $21.95
CO: $44.25
Hero (BTN): $51.20

Preflop: Hero is dealt 4[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] (5 Players)
UTG calls $0.50, CO folds, <font color="red">Hero raises to $2.00</font>, 2 folds, <font color="red">UTG raises to $6.75</font>, <font color="red">Hero raises all-in to $51.20</font>, UTG calls all-in for $15.20
Uncalled bet of $0.00 returned to Hero

I can´t call his reraise for setvalue because of his small stack, but my small pocket pair has a small edge against hands like AKs and worse as long he dosent have a bigger pocketpair then me, right?

I had just sat down at the table and don´t have a read on him, but considering his small stack size my guess is that he is bad.

So what is the best play here fold, go all-in or is there a other way to play this.