Quick Help! Gearbox mount centre nut rotating

[illmonkey]

The centre nut in my gearbox mount (vibra) I've just fitted, just rotates. The torque guide says to do it to 62NM, so I put a wrench on it and it just turns. All other bolts done as the guide, so everything is tight.

The middle one here (not my photo)

 

[illmonkey]

I got it, there is a bolt the other side. Annoying with everything put back together, but possible!