UB50NL: KK gets in interesting spot on the flop

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I can't find a converter for UB, if you know one please tell me.

Hand #40571175-4424 at Verona (No Limit Hold'em)
Started at 20/Mar/07 21:39:18

IL_PLAY_RAGS is at seat 0 with $0 (sitting out).
Hero is at seat 1 with $52.75.
ttgirl is at seat 2 with $50.
gui166 is at seat 3 with $50.80.
thebuck is at seat 4 with $66.45.
mendelevium is at seat 5 with $111.45.
The button is at seat 2.

gui166 posts the small blind of $.25.
thebuck posts the big blind of $.50.

Hero: Ks Kc
ttgirl: -- --
gui166: -- --
thebuck: -- --
mendelevium: -- --

Pre-flop:

mendelevium calls. Hero raises to $2.25. ttgirl
folds. gui166 folds. thebuck calls. mendelevium
calls.

Flop (board: 6h 5h 4h):

thebuck bets $7. mendelevium folds. Hero...

What is your plan on the monotone flop? Villain autopotted it. This is my first real session on UB, as I have just moved there from 100NL stars, and am basically feeling out the site. This has literally never happened to me on stars, I assume because there is no betpot button there. Anyone have insight into what this means on UB?