First find out what SPID63 is doing, is it inside a transaction which hasnt been committed

select * from sys.dm_exec_requests

cross apply sys.dm_exec_sql_text(sql_handle)

cross apply sys.dm_exec_query_plan(plan_handle)

where session_id = 63

http://www.simple-talk.com/books/sql-books/troubleshooting-sql-server-a-guide-for-the-accidental-dba/ chapter 6