Focusrite Saffire Phantom Problem Options

[Bluemover9999]

I'd been using my Oktava MK 319 all day to record vocals with my recently purchased Focusrite Saffire through Logic Pro 7 and everything was great. I decided to take a break, shut my mac down and went out for a couple of hours. When i came back to complete my vocals, I started up Logic and went to do another vocal take and their was barely any signal!

The MK-319 is phantom powered so I checked that the 48V was on and it was, i checked the cables by using an SM-58, which usually has a vastly inferior sensitivity to the 319 and it was fine.

I'm was using some effects through Saffire Control (comp and EQ) I took these off and still no joy.

I've had the MK-319 for about 3 years and I was thinking of upgrading but I've always found it a really steady piece of kit. Now it seemed I might be forced to change!!

So I went out and bought another mic whilst I was in NY this week (Rode NT 1A) and guess what...the same problem!! To be more exact its like the mic has power for a few seconds and then it fades away.

I've sent an email to Focusrite support and I'm awaiting a reply. It must be a problem with the phantom power because my SM-58 works perfectly.

Anyone have any ideas??