I have had the same problem. And when I tried to clear my activation and do it new, I got the "connection Error.
The problem seems to be ADE 4(.0.3) - F..K
Deinstall IDE 4 and installing IDE 3 was solving the problem for me.
Now I can re-download my purchased books
My first Version of ADE was 2, than upgrading to 3 and 4.
I bought the first books with version 2.
My System is an "good old" and actual Windows Vista HP SP2 32bit.
The solution came from following thread:
Thank you so much!!! However, I first tried with Adobe version 3 and had the same problem!
Thanks. I installed the version 3.0 and have the same problem. When reinstalling, activating the pc is not deleted. I tried to change the password but still not ask me activation key to enter the program.