Use sketch entities instead...draw a sketch line over the one in the block and make it colinear....do this for both sketches...and then do the align based on the sketch entities you just added.
Hope this works/helps...
It is starting to work, but no good.
I have exploded the blocks, made 2 sketches on the same plane.
When I choose one point-it works, it goes to the origin.
But when I choose 2 lines or 4 points-nothing.
I definately sounds like the software is confused about the planes, points selected.
Also with the 3D sketches is it possible that there are slight mis alignments that are causing
your contraints not to work as well? Any chance of doing what Filipe suggested and placing
it all in one sketch without the blocks?