Problem With My Elgg User Profile Page, and Contact Importer

Please guys, i installed elgg 1.8.6, and everything worked fine, then i tried adding some features but along the line i discovered that the profile page no longer opens properly, i only see the skeletal parts with some links but its no longer beautiful and nicely looking as it were at first. can someone help me out with this please? because am considering pulling it down and reinstalling but i dont want to loose the already registered members accounts.

Moreso i tried to install the contact importer, for elgg 1.8 , but on trial i discovered that its always saying username and password incorect whenever someone tries to import contacts.


Please its urgent.