The midfielder and striker Fredi Kanoute failed from the spot as Liverpool went through 4-3 in the shoot-out after the game finished 1-1.
We should have wrapped it up in the first hour but were denied by the woodwork and Liverpool keeper Jerzy Dudek.
Liverpool grew stronger but we looked on the way to the semi-finals when Jermain Defoe opened the scoring with 13 minutes left of extra time.
It wasn't to be though with Fredi handling a corner to allow Florent Sinama-Pongolle to equalise with five minutes left before the penalty heartbreak at the quarter-final stage of the competition for the second year running.
"Everyone's gutted, it was a great opportunity for us," reflected a downcast Browny at Spurs Lodge.
"I thought we played well in the first half and had a couple of chances in the second half but we didn't kill them off.
"They got a bit of belief after about 75 minutes and had a good spell but we dug in again, finally got the goal and thought we'd done it but then we give away the freak goal and then the penalties.
"I saw it over and over again in my brain watching it last night, everyone is talking about it this morning but it just didn't happen for me.
"I tried to put it in the top corner but hit it too high. You have to move on and get on with the next game.
"It's on my shoulders a little this morning but we should have killed the game off earlier.
"We didn't, it went to penalties and then you have to be responsible and stick it in the net.
"I didn't do that, I was responsible for my penalty, it didn't go in but I have to move on.
"We would have all loved to have gone through to the semi-finals but it wasn't to be. We now have to be strong and bounce back at Blackburn."
Michael Brown has spoken of his disappointment after missing one of the penalties in our shoot-out agony against Liverpool in the Carling Cup.