NOTE: I found out that his entry issue has been reported by another person.
Feature request stands (see solution part).
You can see the other entry at #234

Problem
Printing with schematica seems not to work in the server (massivecraft)

Description
Blocks placement is not registering, that is, blocks are placed and immediately eliminated. fml-client-lattest.log does not mention printing being disabled.

Diagnosis
I suspect plugins to prevent cheating in pvp or prevent griefing are at fault. It seems the server only registers blocks placed where the player crosshairs meet. I tested this by trying to print a line of wool with print distance adjusted to 1. When I watched the position where the block needed to be placed, the server registered it, otherwise the block was removed after it was set.

Solution
I request to add an option to only place blocks where the pointer is.

As you noticed yourself this is a duplicate of #234, so I'm closing this issue.