Sound "hiccup" (hesitation for a split second)

[Junester]

Hi there...I am new to this, but I was reading about the hiccup problem. I just started using the hoster 4.8 program last week. First night, no problem. Second night while importing singers own tracks my show did the hiccup thing during people singing. It only happened during the import of the song.
I am going to try changing the quality setting as someone suggested, but at the risk of sounding dumb, I don't know how to stop my cd drive from starting up when I put a cd in it. I have seached everywhere I thought it would be and can't find where to do it at. I was thinking that could be part of the problem too.
I have plenty of ram and memeory. Also do you guys leave your anti-virus off the computer you use for your shows?

Thanks