Forward problem

I’m creating an IVR for my company, and in that IVR I want a function to dial a employee.
Most of the time the employee’s extensions is off, so when he doesn’t answer on the extensions I want to forward the call to his cellphone.

The extensions number is 1111 and when I call this extensions (from any other extension) the call forward to the cellphone number i’ve set up. But when I call the IVR (see example) the call drops and after a couple seconds.
exten => xxxxxxxx,1,Goto(test,start,1)

exten => start,1,Answer()
exten => start,2,Dial(SIP/1111,60,tr)

So did I forgot something in the asterisk dialplan? Or is this not possible?

Thanks in advance :wink: