Leave it alone. Keeping baby lacies is like keeping fish - you don't handle them!
Each time you are grabbing hold of it, you are freaking it out, and ruining any trust you may have gained with it. It's like taking two steps forward and one step back.
I don't recommned keeping it in a high traffic area, as you will never see it, and may be waiting even longer for it to become settled. Keep it in a quite area, and give it lots of hiding places throughout it's enclosure. In time it will show itself and start to become familiar with you.
Keeping a lacie whose trust you have gained, is far more rewarding than keeping one that hates your guts.