Subdomain CNAME mapping not working


My System Info:
1. WPMU :
2. Hosting: Shared Hosting
3. IP : Shared IP.

Problem : Subdomain CNAME mapping.
Domain Map Url :
Blog Url :

What i did
1. Added sunrise.php in wp-content
2. Added sunrise variable in wp-config
3. Added CNAME record to at
4. Added Park domain at (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 ?