Sonar X3 stop midi sequnce sound bleeding into next bar

Hi Folks, need help, hopefully I explain this correctly, say for example i record a Zeta sequence for two bars then guitar for third bar, how do I get the zeta sequnce to stop dead at the end of the two bars, currently the dealy echo and fade of the sequence drfits into the third bar where it is unwanted? Thanks a mill folks, I have tried googling before asking :-).

Thanks a mill Rob, i thought id seen in some tutorial somewhere there was an option to tick to stop the sound at the end of the note but just cant find it again or I am mistaken.