Ugggg. I'm frustrated now. I have to send back my 510 wiggly adapter, and my 901 adapter from my PT works on my PT but not on my Protege. Now I'll be stuck with nothing to use my Protege with for probably 2 weeks by the time I send my 510 back and get it fixed and returned. I love my Protege and this sucks. Why would my 901 adapter work on the PT but not the Protege??????