when i start my exist  jetty server first time its run properly but after shutdown it, when i start this server again,in the middle of running servlet this error appeare: (exist is a xmlbd)

File lock last access timestamp: Oct 15, 2007 D:\Program Files\eXist\webapp\WEB-
INF\data\dbx_dir.lck
Found a stale lockfile. Trying to remove it: D:\Program Files\eXist\webapp\WEB-
INF\data\dbx_dir.lck
configuration error: The database directory seems to be locked by another databa
se instance. Found a valid lock file: D:\Program Files\eXist\webapp\WEB-INF\data
\dbx_dir.lck
org.exist.EXistException: The database directory seems to be locked by another d
atabase instance. Found a valid lock file: D:\Program Files\eXist\webapp\WEB-INF
\data\dbx_dir.lck

but i shutdown last process in this port! how can i solve this problem?