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sounds like something is breaking your javascript. Install/Open Firebug (if using firefox) and check the console for JavaScript errors then debug from there. It’s probably a plugin loading some conflicting JS. The other thing I’ve seen do this is loading jQuery from Google CDN in the backend. So if your theme is using the fairly common snippet to de-register jQuery then re-register it from google CDN it should only do so on the frontend.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)