Actually I have tried what you said, and followed what your link said, I could activate through DM, but not wireless.
I find that it seems BES remembers the credentials of my account, no matter how many times I delete my account, after I re-create it, the PIN number appears automatically.
And when I try to do enterprise activation, I always receive an email from
, saying: This message is used to carry data between the BlackBerry Handheld and an associated server. Please do not delete, move or respond to this message - it will be processed by the server.
If I map the device to another account, this message will not appear, and I can do wireless activation successfully.
I suspect it's the problem that the BES account remembers the credential of my account, how can I clear those data thoroughly?