Running Bad at $50NL

I'm playing at Cake and doing very well at their $20NL tables, but every time I move up to $50NL, I run bad. I mean really, really bad. Just check out this hand below. I guess it's a good thing he was a shorty!

HOLD'EM NO LIMIT ($0.25/$0.5) - 2008/01/15 - 14:09:06 (ET)
Table 'Cake: Pebble Beach (6-Max) 11423' 6-max Seat #10 is the button
Seat 1: rjstaats ($7.15 in chips)
Seat 2: bluffarini ($68.10 in chips)
Seat 3: alfredo59 ($5.70 in chips)
Seat 8: Aviendha ($60.95 in chips)
Seat 9: JeNNiBaBii87 ($7.65 in chips)
Seat 10: wolfen ($110.00 in chips)
rjstaats: posts small blind $0.25
bluffarini: posts big blind $0.50
*** HOLE CARDS ***
Dealt to Aviendha [Ah As]
alfredo59: calls $0.50
Aviendha: raises $1.75 to $2.25
JeNNiBaBii87: folds
wolfen: folds
rjstaats: calls $2.00
bluffarini: calls $1.75
alfredo59: calls $1.75
*** FLOP *** [Ad Jc 4s]
rjstaats: bets $4.90 and is all-in
bluffarini: folds
alfredo59: folds
Aviendha: calls $4.90
*** TURN *** [Ad Jc 4s] [Ts]
*** RIVER *** [Ad Jc 4s Ts] [Qh]
*** SHOW DOWN ***
rjstaats: shows [Jh Kd] (Straight, Ace high)
Aviendha: mucks hand
rjstaats collected $17.90 from pot
*** SUMMARY ***
Total pot $18.80 | Rake $0.90
Board [Ad Jc 4s Ts Qh]
Seat 1: rjstaats (small blind) showed [Jh Kd] and won ($17.90) with Straight, Ace high
Seat 2: bluffarini (big blind) folded folded on the Flop
Seat 3: alfredo59 folded folded on the Flop
Seat 8: Aviendha mucked hand
Seat 9: JeNNiBaBii87 folded before Flop
Seat 10: wolfen folded before Flop