Thanks. Twitter is working fine now. I don't know what was the problem because it seems that all settings stayed the same. (I had blank page). I'm not sure that Facebook works OK because I can't see "Done" next to it, and there are no posts.
Here's the report:
Source : youtube
Profile Joomlart
Done : 0 Success And 0 Error
Source : facebook
Profile Default
Profile Hcrv
Source : twitter
Profile Hcrv
test Done : 0 Success And 0 Error
DONE