Hello i'm new here and wonder if anyone can help?

I am using Rybka 2.32 to analyze some correspondance games. I use the infinate analysis setting. She analyses well in the middlegame, but in the endgame slows right down and spends all her time thinking about the last & worst 2 or 3 moves available, hardly reaching any depth whatsoever. Could this be a hash table issue. I have experimented with different sizes but it doesnt seem to change anything.

If i put lots of time on the clock and press 'move now' it analyses fine but i wish to see more than her first choice moves, but then switching to infinite analysis just seems to bog her down completely. Any ideas?

Thanks a lot, nick.