[propbeanie]

There could be several things:
1. Some of the Stock v1.4 (& 1.5) missions do not function as intended ("target" ship missing, or doesn't 'score')
2. You could try the Observation Periscope
3. You have to "Lock" onto the "Target" (<L> key)
4. The 'light' for the Camera menu button does not 'light-up' too well. Click away anyway, and see what happens