Output content to the_content before a plugin does

It appears that Mark Kaplan’s comment led the OP to the proper solution.

But it would be nice for the OP to post his solution as the correct answer, to help others that might have a similar problem.

(Spelunking unanswered questions….)

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