Does the set look like these?
http://pricecutter.com/product.asp_Q_pn_E_P16-4040
It sounds like the you need to set the bit further into the fence so that it lines up with the max depth of your cut (not the bearing), or you need to shim the outfeed fence out a bit to support the stock,and work it like you would when edge joining stock. If you run it the way it is you'll have a lot of snipe on the ends of your stock, and have to cut it off.
Practice for a while in some cheap stuff like MDF until you figure out what works best.
http://pricecutter.com/product.asp_Q_pn_E_P16-4040
It sounds like the you need to set the bit further into the fence so that it lines up with the max depth of your cut (not the bearing), or you need to shim the outfeed fence out a bit to support the stock,and work it like you would when edge joining stock. If you run it the way it is you'll have a lot of snipe on the ends of your stock, and have to cut it off.
Practice for a while in some cheap stuff like MDF until you figure out what works best.