After server migration, new QA servers cannot perform transport even after

  1. Scheduling new RDDIMPDP

  2. SM50 shows all BTC job is waiting.

  3. SDN search and found this issue http://forums.sdn.sap.com/thread.jspa?threadID=331960

Execute SM61 > Click Job-Servergruppen > Assignment of new server. 

SM37 job RDDIMPDP completed.