How to use Webmin in FreeBSD?

[Kenny]

I have installed Webmin successfully from ports. During the
installation, there was no error occurred.

After the installation, I tried to use Webmin. I typed the following
address in the Opera navigation bar:

http://localhost:10000/

Then, I was told by my Opera that there was an error while loading. It
could not connect to the remote host.

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God! What'swrong?
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