To activate your own site click "Like" on the social network "VKontakte" in the appropriate settings must specify the so-called API ID.
Without it, the button will not work.
On the main page of the personal account "VKontakte", go to the section "My Settings".
At the end of the page with the settings to draw attention to the link "Developers" and go through it.
On the next page, click on the section "Authorization and widgets for websites".
From these widgets, select "Like".
In the "Site / Application", select "Connectnew site". Fill in the "Site Name", prescribes the address of the site. The main domain site will register automatically. Click on the "Save" button and send the code shown in the image.
Then, from the field "Embed" copy numbers apiId and paste them into the required field settings button "Like" in the site administration panel.