SIP flow for Queue

I’m working on SIPp test case to connect calls to queue and I’m wondering if this is correct because I keep getting errors at the 2nd step, 407.
Therefore I wonder if below is correct.

  INVITE ---------->
     407 <----------   
     ACK ----------> 
  INVITE ---------->
     100 <----------  
     180 <----------  
     200 <----------  
     ACK ---------->
          [ NOP ]
   Pause [   8000ms]
          [ NOP ]
   Pause [   1000ms]
     BYE ---------->   
     200 <----------

anyone can help?