$55 ITM: What does it mean when BB min reraises your raise?

[AA suited]

PartyPoker, Big Blind is t300 (3 handed) Converter on pregopoker.com

HERO (t4145)
SB (t1555)
BB (t4300)

Preflop: HERO is in Button with A[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/heart.gif[/img]
<font color="red">HERO raises t700</font>, <font color="gray">SB folds</font>, <font color="red">BB raises t1100</font>, HERO calls t400

Flop: (t900) 6[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/club.gif[/img] (2 players)
<font color="red">BB bets t300</font>, HERO? [img]/images/graemlins/confused.gif[/img]

Villian has been chip leader since lvl4. He likes to limp in alot.

this is the 1st hand where i have &gt;10BB. all other times i push and he folded when he was BB, or limped in.

What's your line here?