I had the same problem, like stated above it's Blizzard fraud prot.

Unlucky as I was, I did this on a friday. Tried again after 24 hours, but that didn't help.

I called support on Monday, talked to a VERY friendly woman wich called me back after 15 minutes to ask if I was able to transfer after she tried fixing it. I can truly say, I have never had that good support ever in my life.