Problem with Queens...

Here is some information on Villain:
-Once raised 4xBB in LP with QTd. Flop came 982 rainbow. He called a $70 bet on flop with a gutshot. Turn was a brick. He called a $150 bet with a gutshot. River paired his queens, and he called a $300 bet.
-Once bet out $40 with ATo on the flop of 732 two diamonds. I raised to $100 and he called with nothing.

Can you guys give me some information on this line I took? Also since this board didn't really hold any draws, its safe to assume a large overbet means strength, correct?

PokerStars No-Limit Hold'em, $10 BB (6 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

CO ($563.75)
Button ($1164.75)
SB ($368.50)
BB ($545)
UTG ($2072.90)
Hero ($999)

Preflop: Hero is MP with Q/images/graemlins/spade.gif, Q/images/graemlins/heart.gif.
UTG calls $10, <font color="#CC3333">Hero raises to $50</font>, <font color="#666666">4 folds</font>, UTG calls $40.

Flop: ($115) 6/images/graemlins/spade.gif, 4/images/graemlins/diamond.gif, 6/images/graemlins/heart.gif <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets $80</font>, UTG calls $80.

Turn: ($275) 2/images/graemlins/club.gif <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets $150</font>, UTG calls $150.

River: ($575) T/images/graemlins/spade.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets $1240</font>, Hero folds.

Final Pot: $1815

[VarlosZ]

Betting all the way is correct if he was making loose calls.

On the end, you're getting a little less than 2-1 on your call. Are you going to have the best hand better than one time in three if you call here? I doubt it, so I'd fold. You've been representing a high pair the whole way, and he's got no reason not to believe you.