What Lovibond level is the crystal? 2lb is going to be quite a bit, unless it is pretty light, even a 40L is going to give you an 11 SRM, which pretty much puts it into Dunkelweiss territory. Plus, you are looking at a 1.060 OG.
You will probably be disappointed with the WB-06. Your beer will taste of bubblegum and soap suds.
With a Hefeweissen ("Hefe" means yeast), the yeast is EVERYTHING. Track down a nice liquid, like Wyeast 3068.