Act Two - Mission 12 'Hunter or Hunted'?

Please help - I have mission 18 'momma wolf'shown in the objectives screen, but every time I rendevous with the convoy, a mission critical ship blows-up? I know I need to complete mission 12 as a pre-requisite but cannot activate it. Any ideas[?]

Is your game patched? If not, download and install the patch... it fixes a couple of mission bugs.

Are you running any mods? If so, turn them off... they interfere with mission scripts at times.

No confusion; just wrong or right ... Only Solutions