The mod instructions clearly say you need an app id and the facebook platform enabled for this mod to work right.
Without the above the facebook javascript isn't put on every page, which is what is necessary since this mod puts the Like button on pages vBulletin never intended.
I suppose if you are adverse to putting in an appid you could make an edit to the
more_share_tng template.
Find the line:
Code:
<vb:if condition="$msot['fbold']">
and change it to:
Code:
<vb:if condition="1">
That will force the FB JavaScript on every page, but it still looks for an appid... Not sure if it will work correctly without one. Worth a try though I suppose.
If it doesn't work be sure to Revert the template back to normal.