I have wordpress 3.3 site with domain site1.com, it is in hostmonster as a Primary domain. I have setup network using sub-directory mode in the site, it works well.
I create another site: site1.com/newsite , It work well.
Then I followed all instructions to install and setup "WordPress MU Domain Mapping" plugin and mapped netsite.com to the new site: site1.com/newsite , but mapped domain does't work. The new domain netsite.com just only display same content as the site1.com
In fact, the new domain netsite.com ever worked, it ever could display same content as site1.com/newsite when I finished mapping first time. But after several days, I found it became to point at site1.com although I did not do anything.
Then I try to reinstall plugin and re-setup, It doesn't work yet.
Please help me.