adt and a password may be incorrect

I am tyring to package up a air file to a apk file in windows 7 using the command pompt.

here is the command I run

adt -package -target apk -storetype pkcs12 -keystore DigitalCertificate.p12 myApp.apk MyApp.air

the cmd askes for my password, which I enter, and do so correctly, it is only 123 so I know I am not typing it wrong.

I get the following in the cmd

could not load keystore file (password may be incorrect)
usage:     adt -checkstore SIGNING_OPTIONS

I created the p12 file in Flash Builder, I have tried createing multiple p12 files, and then I re build my .air file and try again, same thing everytime.  Does anyone have any idea?

Thanks