awful sound when arming track for record

[BenDorigan]

I recently installed ProTools LE 8 with the Mbox 2 mini interface on my Mac G5. Too often when I click the record button to arm a track, the light meter on that track pegs out (mix window) and a deafening screech blasts through my headphones. (I make sure they're off my head before I click record now.) I can occasionally remedy this by restarting the computer but doing so each time gets counter-productive. Any advise?

[Zicky94]

I get the same problem in pro tools 10 with a focusrite 2i2. Please help!

[YYR123]

To zicky b/c Ben's post is
So old

Check ur levels turn your gain pots all the way down -

Make sure ur routing is correct in ur I/o setup

If its screeching on mic input switch to line to see if it stops

As always latest drivers for the 212 and latest asio drivers as well

[JazzyJ]

mute the track!

You're using an mbox mini with a 'latency mix knob'! You monitor there, NOT through Pro Tools.

Read the manual.......

[Ben Jenssen]

This has come up before. Some have said it's not feedback, that it behaves like some kind of bug.

I think someone solved it by just trashing prefs. Worth a try.