Subdomain CNAME mapping not working

Hi,

My System Info:
1. WPMU : http://smartmobilesite.mobi/
2. Hosting: Shared Hosting
3. IP : Shared IP.

Problem : Subdomain CNAME mapping.
Domain Map Url : http://mobile.glenwoodauto.com
Blog Url : http://glenwood.smartmobilesite.mobi

What i did
1. Added sunrise.php in wp-content
2. Added sunrise variable in wp-config
3. Added CNAME record mobile.glenwoodauto.com to glenwood.smartmobilesite.mobi at glenwoodauto.com
4. Added Park domain at smartmobilesite.mobi (Don't know if needed or not. )
5. Even deleted some lines from wp-config as suggested.

Can you let me know what i have been doing wrong ?