Head Banging over Rewrite Rules

[Whisper]

I am looking to use a URL like http://go.mydomain.org/822 and have it rewritten to a URL http://mydomain.org/abc/index.php?page=index&id=822&showcomments=0

All I keep on seeing is this message
The requested URL /822 was not found on this server.

The Rewrite stuff I have is

RewriteEngine On    # Turn on the rewriting engine
RewriteCond %{HTTP_HOST} ^go\.(.)/[0-9]+$ [NC]
RewriteRule ^/(.) http://$1/abc/index.php?page=index&id=$2&showcomments=0 [NC,L]

Can someone help me with this.

I basically took an Apache website example and modified it to what I would like but its not working. The server has URL rewriting but I can not seem to get anything I set up to work. It is obviously doing something because it can't find the URL /822 on the server.

[Whisper]

So I been reading and trying to understand and tried other things and now have...

Options +FollowSymLinks
RewriteEngine on    # Turn on the rewriting engine
RewriteRule ^([0-9]+)\.(.)$ http://$2/abc/index.php?page=index&id=$1&showcomments=0 [NC,R]

which will accept a url like http://1234.mydomain.org/ and turn it in to or should turn it in to http://mydomain.org/abc/index.php?page=index&id=$1&showcomments=0 BUT!!! It doesn't, it turns it in to http://1234.mydomain.org/abc/ and I am still banging my head.

What am I doing wrong here?