sql server removing service_queues
Queues are schema bound objects and as such they may belong to a different schema than your current default schema (likely dbo). If that's the case the DROP statement must qualify the queue with a two part name:

DROP QUEUE &lt;schema&gt;.&lt;queue&gt;;


You can get the schema name from sys.service_queues:

SELECT SCHEMA_NAME(schema_id), name FROM sys.service_queues;