DB Connecting Problem

[KENNETH JANUSZ]

I'm having a problem of logging on to my two DB's.    When I check "services" I notice that the listener is not running.  I startup the listener and it shuts down immediately.  The listener will not stay up. When I try to log into the DB's I get these errors. KEN database - Oracle generated name is DC0X4411 ORA-12154: TNS: could not resolve service name PARTS database ORA-12541: TNS: no listener My DB is 9.0.1 on XP Prof. Any ideas as to what could be causing this? Thanks much, Ken