Step Generator in synk

Hi!
I have just put together a program in Rapture. It contains pad sound in the upper octaves >C4 (elements E1-E2) , and a base pattern in the lower octaves <C4 (elements E4-E6). The pad runs free and the base pattern is constructed in the step generator ( 8 steps in pitch and amp). And I can't get it to start on the first step. Why is that? Most of the time it starts on step 6-7. I'm fairly new to Rapture. I have had it for a long time but rarely used it. Can anyone give me a hint of how to get it right?
/ Hans