Well... i'm trying to build myself a House, but even with Snap to Grid and Snap to Angle ON, the pieces don't fit in each other... Help ?

Note that i'm using the correct pieces !

http://www.youtube.com/watch?v=lruZ1NP0fXM&feature=g-upl&context=G2fff824AUAAAAAAAAAA

Both pieces must be angled either 0, 90, 180 or 270 degrees. Or else they won't fit. It seems one of your pieces is not angled this way. (the one with the door)

Just rotate that piece one "click" in either direction.

Shift+K to resnap the reference, position and angle, so use a well placed piece when you do that.

Thanks Alot Guys !!