I installed a wordpress site NOT in main directory (public_html) of the server, but in a folder called "bandaranayakecollege". And installed another wordpress site inside "bandaranayakecollege" to use as the blog.
So my sites paths are as follows.
Main : public_html/bandaranayakecollege
Blog : public_html/bandaranayakecollege/blog
Then I created an addon domain in my server (which I purchased before) called "www.bandaranayakecollege.org" to direct to main site and created a sub-domain called blog.bandaranayakecollege.org to direct to the blog. Upto this point, all was done long ago.
Today I activated multisite using "sub-domain" (WordPress didn't allow me to select sub-directory since my site was not newly installed) successfully in my main site, "www.bandaranayakecollege.org" and it seems working fine. After activating that I tried to add the blog to the network, but it doesn't seem to work as I thought. The blog is shown in "Sites-->Sites" in Network Admin area, but it is not shown in themes, users and updates.
What could be the reason? Hope for an immediate solution.
Sorry for my bad English.