htaccess timtumb issue for using subdomain url

[rishibala]

Hi, I am newbie to htaccess. i am using timthumb for resizing the images

 

RewriteRule ^inner-banner/(.*)\.([jpg|gif|png|JPG|GIF|PNG]+)$ timthumb.php?src=http://mydomain.com/images/banner/$1.$2&h=350&w=960&zc=0 [QSA,L]

This gives me the result : http://mydomain.com/inner-banner/myimage.jpg

 

Now i mapped a subdomain to the folder images.

 

http://subdomain.mydomain.com is mapped to the images folder.

 

So now i need to show the above result as http://subdomain.mydomain.com/inner-banner/myimage.jpg

 

i modified the htaccess like

 

RewriteRule ^inner-banner/(.*)\.([jpg|gif|png|JPG|GIF|PNG]+)$ timthumb.php?src=http://subdomain.mydomain.com/banner/$1.$2&h=350&w=960&zc=0 [QSA,L]

Expected Result: http://subdomain.mydomain.com/inner-banner/myimage.jpg

 

But it is not coming like that. it shows 404. Kindly help me resolving this issue.