Buildcraft version 4.10.0
Mystcraft version 10.6
Forge version 9.10.1.870

when i put my quary in a mystcraft age it don't wanne work it mine the first 18-20 blocks and than it's stop working. Relog and refresh minecraft does not work !

Made a clean install of
Minecraft: 1.6.2
Forge: 9.10.1.870
Mystcraft: 10.6
Buildcraft: 4.1.0

Jumped into a Mystcraft random world and set up a quarry. It drilled down to bedrock with no issues.

the problem has to be caused by another mod

It worked for a while, then the frame stopped building. I built the frame manually in creative then the quarry started mining really slowly.

Also drops a single frame block on startup.