Facebook likes websites problems

So, i have an account on socialmediaexplode, one in addmefast and one in ycl. I try to get some photo likes from a fan page, for a competition. While trying to add the photo for likes:
-on addmefast i get this error while trying to use "facebook post like": "Facebook post url that you are trying to add is invalid, is not public or visible only for logged FB users."

-on socialmediaexplode i get this error while trying to use "facebook photo like" (already 600+ likes) "ERROR: Your photo must have atleast 1 like to be added."

-on ycl i get this error while trying to use "facebook photo like" : ERROR: That photo cannot be added! We accept only fanpage photos!

So, what am i doing wrong? The admin of the cotest did something against "cheating" or what?

hey i have similar problems when i try to add tweet for retweet ..it gives me an ERROR saying its not the right the link.