Thanks for the reply. I really need this.
Ok, the categories which was preloaded during installation were alright. New categories created but the funny part is, some were shown under "Group mgr" tab when creating group, some were not.
I tried creating from frontend, some users able to create new group, some not.
I suspect it was due to I installed and uninstalled couple of times which caused the data connection to be screwed up.
I consulted a friend who is in the IT field, he said the message shown that, the application working fine but I could be the data connection or synchronization were messed up.
I installed Mamblog as well, but users were not able to post blog.
The article, forum and other applications work well too.
(Sorry for the unorganized format of my layout, I really do not know how to list them in kinda related sequence)
I am not familiar with sql. so even I check I wonn't be able to see the mistake.
I am really sorry for the mess that I have to bother you with.
Please be patient with me, thanks.