Disk too slow while recording real instruments

Hi everyone, I've got this problem that I found out is not new.
What frustrates me is that I didn't have this problem on GB '09.

I didn't record for a while in my MBP since I had the previous iLife version, but few days ago I needed to record a children chorus, and I thought that I could use my Edirol FA-66 with my awesome MBP.
I was testing at home before the performance, and for some reason all my recording on GB stopped at about 45 seconds... with the message "disk it too slow (error 10005)".

At the first time I thought that I could have made something wrong, I looked for a solution on this forum and in other sites, but there's not a real solution, except for the "File Vault" thing that couldn't help me 'cause it's not turned on in my mac.

In the end I recorded the performance... using Audacity... That I must say worked perfectly.


The point is that I had to use GB, and I need it to record also my own songs and stuff...


I really hope that someone can help me solving this.

I repeat shortly what I use and what I need:
I have a MBP with i7, 8Gb ram, hard dist at 7200 rpm, and I was recording music through an edirol fa-66 pluged on firewire, GB says disk is too slow.
Even tho I closed every application the problem is still here.

Thanks for your attention,
Regards,
Maurizio