I'm a new owner of a DC825 18V cordless impact and I just picked up the DEWALT DW0521 Quick Connect Impact Driver Conversion Chuck for this new drill. My problem is, when I tighten the drill bit inside the chuck, it still seems to spin and never really get totally tight. I can hold the chuck with my hand and give the drill full power and it won't spin out of my hand. If I try to use a 1" spade bit in wood, it also has hardly any power and will just stop and spin inside the chuck. Not the bit, but the chuck itself seems to be spinning inside somehow and you can hear it clicking as if it were an impact or something. I also noticed that if I take my had and push forward on the round part of the chuck while squeezing the trigger on the drill, it spins inside the chuck but does not make any impact noise...it just spins totally freely. I don't know if I've done something wrong or not using this correctly or what. It would seem to be a very simple attachment, but so far it's frustrating me.
Anyone have some insight into this DW0521 part?

Thanks
Oh and here's my new toy :-)
