Hi Naka^2,
I am new to RC5 also, and missed your first post. What kind of a comp are you running it on? One of my RC5 computers is a 486 dx4 100 mhz and it was the first to do RC5, so I know for a fact it turns in a solid 16 blocks a day. My guess is that you have some program that is running that occupies enough of the cpu to make the d.net client think that the computer is busy and thus not crack. Just a guess. Could you give us some more info on how you use your computer.