Domain Mapping Problems - Can't change subdomain to custom domain

back with another problem (hope you guys don't mind :slight_smile:

I install multisite, create some sub-blogs, and want to map it into custom domain, but failed couple times.

I already :
- put the sunrise.php in wp-content
- domain-mapping.php in mu-plugins
- I ping my own site, and write down my IP
- I submit my IP on super admin > options
- I go to subblog backend, setting > domain mapping > insert my domain name
- and boom!, I got ..., nothing.

the sub-blog is : yukbelanjaonline.kaskushop.com, and I want to map it into yukbelanjaonline.com

now, every time I go to yukbelanjaonline.com or yukbelanjaonline.kaskushop.com, itu go to the same page. which is http://yukbelanjaonline.com/cgi-sys/defaultwebpage.cgi

thanks for the help,
Denny