Cannot start Web Cache in Oracle 10g App Server

Hi,
Our Application runs on Oracle10g App Server,
When it tried to start WebCache using the command
opmnctl startproc ias-component=WebCache process-type=WebCache
it shows the error...
opmn id=oracle10g:6200
no enabled components for this request
When i tried to enable WebCache using Enable/Disable Component in Oracle 10g Enterprise manager - I can't see WebCache component it to enabe or disable it.
When i tried opmnctl status., it shows
------------------------------------------------+---------
ias-component | process-type | pid | status
------------------------------------------------+---------
HTTP_Server | HTTP_Server | 7276 | Alive
LogLoader | logloaderd | N/A | Down
dcm-daemon | dcm-daemon | N/A | Down
OC4J | home | 7684 | Alive
OC4J | rhs | N/A | Down
OC4J | instaremit | 5880 | Alive
OC4J | insta_test_apr_02 | 7100 | Alive
WebCache is not running, also as the WebCache is not listed in Oracle 10g Enterprise manager, i can' enable or disable it.
Plz Help me over this.,
Regards.,
Deepak.C

Hi.,
Thanks again !!!
Yes, My Oracle HTTP Server is listening on port 80.
I am not clear, may i know why should the ports be changed for the request to go through Web Cache ???
Can i assign port 80 for Web Cache and 7778 for HTTP Server ?
Also In Oracle Enterprise Manager, Web Cache is not available...
home, HTTP Server, management alll these are there...
Also for HTTP Server, it's not showing any metric info, 'Not Yet Available' is shown even though the HTTP Server is running, how can i get metric info about Oracle HTTP Server, i have also used dmstool -t ohs_server, its not working
It's showing... FLEXMON ERROR : detected invalid table name ohs_server
dmstool -l -t also does'nt lists ohs_server
Hellp me over this.....
Deepak.C

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