Enterprise Manager Problem

I just installed 10.2. Oracle on a Windows XP machine.  I set up this little 'loopback adapter'  instructed as this is a dhcp machine.
  When i try to open EM, i get
"Error"
"java.lang.exception: Exception in sending Request::null"
contents of logfile follows:
2009-04-02 12:12:22,710 [MetricCollector:HOMETAB_THREAD600:60] ERROR

rt.DbMetricCollectorTarget _getAllData.328 - oracle.sysman.emSDK.emd.comm.CommException: Exception in sending Request :: null
oracle.sysman.emSDK.emd.comm.CommException: Exception in sending Request :: null
      at oracle.sysman.emSDK.emd.comm.EMDClient.getResponseForRequest_(EMDClient.java:1319)
      at oracle.sysman.emSDK.emd.comm.EMDClient.getResponseForRequest(EMDClient.java:1212)
      at oracle.sysman.emSDK.emd.comm.EMDClient.getMetrics(EMDClient.java:637)
      at oracle.sysman.emo.perf.metric.rt.DbHomeTab._getAllData(DbHomeTab.java:324)
      at oracle.sysman.emo.perf.metric.rt.DbHomeTab.getData(DbHomeTab.java:139)
      at oracle.sysman.emo.perf.metric.eng.MetricCached.collectCachedData(MetricCached.java:402)
      at oracle.sysman.emo.perf.metric.eng.MetricCollectorThread._collectCachedData(MetricCollectorThread.java:596)
      at oracle.sysman.emo.perf.metric.eng.MetricCollectorThread.run(MetricCollectorThread.java:320)
      at java.lang.Thread.run(Thread.java:534)
2009-04-02 12:12:42,819 [EMUI_12_12_42_/console/database/instance/sitemap] ERROR perf.sitemap initializeGeneral.398 - Failed to initialize object: ORA-20206:
ORA-06512: at "SYSMAN.EMD_DATABASE", line 1165
ORA-01403: no data found
ORA-06512: at line 1



I have dropped the database and created a new one with the same results.
Any ideas how to resolve this EM problem?
xoxomosAsked:
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schwertnerCommented:
Turn off the default firewall.
Make the loopback adapter first adapter.
Does the listener runs?
What about the famous registration of the instance by the Listener
that could be checked so from command line:

lsnrctl services
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xoxomosAuthor Commented:
Looking at the logs, maybe it has to do with that time zone business.  I'm  in the Pacific area and it was impacted.   I recall some patches from Oracle that corrected that problem, but since this is a play box......
 (error = 10061)
2009-04-02 11:57:21 Thread-3868 ERROR main: nmectl.c: nmectl_validateTZRegion, agentTZoffset =-420,and testTZoffset for America/Los_Angeles:-480 do not match
2009-04-02 11:57:22 Thread-3868 ERROR main: nmectl.c: nmectl_validateTZRegion, agentTZoffset =-420,and testTZoffset for America/Los_Angeles:-480 do not match
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schwertnerConnect With a Mentor Commented:
If you have installed 10.2.0.1 then you have to upgrade to 10.2.0.4
to avoid the timezone issue:

Also Check the current version of the Oracle time zone definitions
SQL> conn / as sysdba
Connected.
SQL> SELECT version FROM v$timezone_file;

   VERSION
----------
         4

If this reports a version 4 then there is no action to take for the Oracle time zone definitions, apply 10.2.0.4 or upgrade from 10.1 to 10.2.0.4 without any action on TSLTZ or TSTZ data. Follow the upgrade or patchset apply instructions, you can skip any DST related sections.

Also consider the Oracle script Fix1882.sql that could be easilly found using Google.
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schwertnerCommented:
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xoxomosAuthor Commented:
Thanks
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