Edirol Fa 66, problems with macbook pro Options

[bosc]

hello guys,

i´m new in the forum and need to know if someone can help with the following:
i have a macbook pro working with windows xp pro. To record songs i use cubase sx 3 and edirol FA 66.
The problem is that when i use the edirol with cubase, the sound doesn´t work well, even when i´m playing and recording. seem´s the metronome stops or jump but it isn´t a fix thing. cant old the correct time.
I try edirol in mac os x with logic and it works well. But in windows with cubase doesn´t work.

i didn,t to upgrade cubase sx3 to 4, because with that maybe edirol works on mac os x.

any help please.

bosc.