Having trouble proxying WordPress using mod_proxy

Hi There,

I’ve installed WordPress on a server under /my_blog/ it is configured to work as https://www.mysite.com/blog1/

Now, https://www.mysite.com points to a different server. This has Apache with mod_proxy and I’ve added the following line to httpd.conf

ProxyPass /blog1 https://192.168.100.60/my_blog

But whenever I hit https://www.mysite.com/blog1/ I get the “Nothing found for My_blog” error. Do I need to hack something in order to get this working?

Contents of .htaccess on the 192.168.100.60/my_blog/

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /my_blog/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /my_blog/index.php [L]
</IfModule>

# END WordPress

This diagram should give you more info on what I am looking to achieve.
https://filedb.experts-exchange.com/incoming/2011/03_w12/429694/LoadBalancing-via-mod-proxy.JPG

Please help.