Can't open Application Server Control

I'm not familiar with Oracle AS, and after installation i can't enter to Application Server Control via web interface.
I receive 404 error (Page not found) vi http://10.160.2.243:7777/em link. But HTTP server is working via http://10.160.2.243:7777 link.
I run the opmnctl status
Processes in Instance: test.oastest
--------------------------------------------------------------+---------
ias-component | process-type | pid | status
--------------------------------------------------------------+---------
OC4JGroup:default_group | OC4J:oc4jhome | 11407 | Alive
ASG | ASG | N/A | Down
HTTP_Server | HTTP_Server | 11406 | Alive
I digged some logs (in opmn and oc4j home folders) but could not find anything related errors.
Can someone help me in whcih way i should forward to solve this problem ?

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Are you sure you have configured a EM? Did you select "Configure this as an Administration OC4J instance" during the installation?
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[name]oc4jadmin[name]
[display-name]OC4J Administrator[display-name]
[guid]88836370D11611DC9F30F9C1CD6F1A73[guid]
[description]OC4J Administrator[description]
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Greetings.

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Unable to get 10g application server control page

Need Urget help
hi
Operating system windows 2003 with sp1
Application server 10g-- v 10.1.2.0.2
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i can access welcome page on
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i checked all almost every thing
all services or running sucessfully
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cu
Andreas

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