Have you tried resetting from within android?
System settings > Privacy (I think) > Factory Reset **BE CAREFUL, this might format your sdcard, I'm not sure. So either keep the card out (If you're not doing a2sd or similar stuff, or back it up**
Also, for the device hard reset, it's volume UP only.. But I think it was part of windows mobile ROMs so it might not work with MAGLDR.
Another option for you to try is to reflash MAGLDR. That might erase your stuff, but I don't know how you'll put CWM back since your CALL key is not working.
Sorry, I don't have the HD2 anymore and I'm kind of rusty.. Hope the above helps
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OnePlus One: Carbon 4.4 with Franco kernel.