AJs, J on flop against shortstack

Tell me where the mistakes are here . Fold preflop? As played, I have to call the flop bet, right?

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.10/$0.25
8 players
Converter

Stack sizes:
UTG: $17.65
UTG+1: $25
Hero: $25.75
MP2: $14.75
CO: $24.90
Button: $9.50
SB: $25.25
BB: $24.10

Pre-flop: (8 players) Hero is MP1 with J A
2 folds, Hero raises to $1, 2 folds, Button raises to $2.25, 2 folds, Hero calls.

Flop: 8 5 J ($4.85, 2 players)
Hero bets $4, Button raises all-in $7.25, Hero calls.

Maybe I fold to the repop, prolly not though. I think felting TPTK against a shortie is fine.

Shortie's range here:
AA,KK,QQ,AJ,JJ,55, 88
most likely
KJ, Flush draw, married to his AK, QJ,

Fold preflop. Unless he's a maniac you're way behind his range.