2pair blind battle

I have trouble playing these hands, do you play this the same, and just fold on the river or do you try and make some sort of blocking bet...? What's the best line here?

POKERSTARS GAME #5214299388: HOLD'EM NO LIMIT ($1/$2) - 2006/06/10 - 19:08:57 (ET)
Table 'Thalia' 6-max Seat #6 is the button
Seat 1: andr3w321 ($202 in chips)
Seat 4: MidwestNuts ($389.35 in chips)
Seat 5: TalentedTom ($340.90 in chips)
Seat 6: bonesy ($224.50 in chips)
andr3w321: posts small blind $1
ned04: is sitting out
MidwestNuts: posts big blind $2
*** HOLE CARDS ***
Dealt to andr3w321 [:8c: :6c:]
ned04 leaves the table
TalentedTom: folds
wolek joins the table at seat #2
bonesy: folds
andr3w321: calls $1
MidwestNuts: checks
*** FLOP *** [:6h: :5c: :8d:]
andr3w321: bets $4
MidwestNuts: calls $4
*** TURN *** [6h 5c 8d] [:7s:]
andr3w321: checks
MidwestNuts: bets $4
andr3w321: calls $4
*** RIVER *** [6h 5c 8d 7s] [:Ac:]
andr3w321: checks
MidwestNuts: bets $13.95