Thanks for the reply guys...
Actually, I'd tried the instruction given in the FAQ, but no luck.
Next thing I register my device PID in mobipocket site in case it'll help, and re-download the file again from the cyberread, then following the instruction again, trust me, still no luck. I'd tried and tried for some couple of hours with the file, wondering how to make it works.
Then finally I got the email reply.
But the problem's solved now, they will refund the payment.
And they said that they will upgrade the system to the normally put your own PID kind of thing (like Bob and Fictionwise), and when they'd upgraded I'd like to give it another try and I hope there won't be any problem then
Can't wait to the celebration part