Any problem with this play?

***** Hand History for Game 1919154230 *****
$25 NL Hold'em - Tuesday, April 19, 15:59:12 EDT 2005
Table Table 37279 (Real Money)
Seat 4 is the button
Total number of players : 10
Seat 1: ender555 ( $56 )
Seat 5: brumagnus ( $15.05 )
Seat 7: Wodzzy ( $43.3 )
Seat 10: pa_kettle ( $24.2 )
Seat 4: Greendie1 ( $27.35 )
Seat 9: mixon_swe ( $26.1 )
Seat 3: Jack_ACE ( $34.8 )
Seat 8: horseboy180 ( $19.65 )
Seat 6: BKITU ( $29.9 )
Seat 2: Kotasx ( $18.35 )
brumagnus posts small blind [$0.1].
BKITU posts big blind [$0.25].
** Dealing down cards **
Dealt to ender555 [ 5c 6c ]
Wodzzy folds.
horseboy180 folds.
mixon_swe calls [$0.25].
Wodzzy: no one forces u
pa_kettle folds.
ender555 calls [$0.25].
Kotasx folds.
Jack_ACE folds.
Greendie1: If you feel you should be playing J6 and 57, then by all means, go ahead.
Greendie1 folds.
Wodzzy: u can plau ur XXXXy hands if u want
brumagnus calls [$0.15].
>You have options at Table 36877 Table!.
brumagnus: lol
BKITU: ROFL
brumagnus:
BKITU checks.
** Dealing Flop ** [ Jc, 7d, 8c ]
brumagnus checks.
BKITU checks.
>You have options at Table 37509 Table!.
mixon_swe bets [$1].
ender555 calls [$1].
brumagnus folds.
BKITU folds.
** Dealing Turn ** [ 4h ]
>You have options at Table 36877 Table!.
mixon_swe bets [$0.45].
ender555 raises [$2].
Greendie1: In fact, in super system 3 brunson tells us to play those hands.
mixon_swe calls [$1.55].
** Dealing River ** [ Kd ]
brumagnus: lol
brumagnus: roflmao
mixon_swe bets [$4].
ender555 raises [$15].
mixon_swe is all-In [$18.85]
ender555 calls [$7.85].
ender555 shows [ 5c, 6c ] a straight, four to eight.
mixon_swe shows [ 9s, Th ] a straight, seven to jack.
>You have options at Table 37509 Table!.
mixon_swe wins $50.1 from the main pot with a straight, seven to jack.
Kotasx has left the table.

You got pwned. Tough luck. There's no reason to put him on a better hand than you. No pair on the board, no flush possibilities - he is lucky enough to have the only hand that beats you. And he flopped the straight, and let you catch up enough to keep giving him money. Nasty.