For about the tenth time in the last two days I have lost to runner runner on the turn and river. The latest one whent just like this. maybe someone can tell me what i am doing wrong.

I was the BB in a nl game of .05/.10 I know it is really low limit but i use this to get better at online games. I play mostly live games.
I had k7 o
the pot was limped around to me.

flop k78 of diamonds
I bet a 1.00 in a .40 pot.
i got one caller who was under the gun.

The turn was q
I went all in
got called
the river was a q
I lost to qj off suit no diamonds

is there any one out there that can help