Minecraft Crash (*USED INSIDE A COMMAND BLOCK*): /summon FallingSand ~ ~1 ~ {Time:1,TileID:132}

I put the following command inside a command block without the quotations:

/summon FallingSand ~ ~1 ~ {Time:1,TileID:132}

. I put a button onto the command block and I press it. It works but if I press it again it crashes my minecraft.