point folder to different URL

[h2onet]

I am migrating sites to a new server and while doing this, I need to point a folder from the new server to the old.  Specifically, I need /images/idx/* to point to http://www.othersite.com/idx/abc_photos/*

 

I tried this rule and is does not seem to be working:

 

RewriteRule ^/images/idx/(.+)$ http://www.othersite.com/idx/abc_photos/$1 [R,L]

 

example:  http://www.currentsite.com/images/idx/10000000/40000/9000/10049261-1.jpg should be seeing http://www.othersite.com/idx/abc_photos/10000000/40000/9000/10049261-1.jpg.  The numbered folders and jpg will change depending on the image.