Lucky, the person was very intelligent and e-mailed me saying they couldn't get through, so I was able to call them back and get it going...
Another problem is that they were English... So I had to really concentrate to get around the accent.
And the final problem is that, for once, the position seems to be out of my league. I would love to take it on, but I can't in good faith says I'm the person for the job.