Donk Bet 99 on Flop..Better line to take?

[allrightfine]

My first post and as you can see, I have a lot to learn.

I've tried this line a bit in this situation lately with mixed results.

I'm trying to fold AK, AQs without dealing with a continuation bet.

Villian is classic TAG through 50 hands.
The other two in the hand both have vpip's over 50

What action is better here? Is this donk bet ok if only Villian and I were in the hand?

Full Tilt Poker
$0.25/$0.50 No Limit Hold'em Ring Game
6 Players
LegoPoker Hand Converter

<font color="black">Stack Sizes</font>
CO: $51.30
BTN: $86.20
Hero (SB): $65.9
BB: $79.05
UTG: $20
MP: $29.15

<font color="black">Preflop:</font> 9[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/spade.gif[/img] ($0.75, 6 players)
UTG calls $0.50, MP folds, CO calls $0.50, <font color="red">BTN raises to $2.50</font>, Hero calls $2.25, BB calls $2, UTG folds, CO calls $2

<font color="black">Flop:</font> 4[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] ($10.5, 4 players)
<font color="red">Hero bets $8</font>, BB folds, CO folds, <font color="red">BTN raises to $23.50</font>, Hero folds
Uncalled bet of $15.50 returned to BTN