UDOOQuad: Shairport not working

Having installed the latest Version of Volumio on my UDOOQuad all Volumio Functions work great with my DAC.
Only shairport does not show up in my Airport devices in itunes or on my iOS devices.
After manually starting shairport it shows up as as “shairport on volumio”.
When i start streaming to it it crashes.
Any idea ?

anybody out there who has an idea ?