ChanSpy problem - busy signal

Hi,
I set up following

exten => 800,1,ChanSpy(SIP|q)
exten => 8160,n,Hangup
also try with
exten => 800,1,ChanSpy(SIP,q)
exten => 800,n,Hangup

when I call 800 they give me a busy signal
Any help?

10x