It appears that the exact order numbers and letters is simply based on your ID that you used to register it because my codes have yet a different order.
But here are a few suggestions that you may or may not have tried:
-Make sure the code you have is correct, login into your account at
www.ereader.com (the new name of PalmDigitalMedia) and check what you have against what they have.
-Make sure your ID for eReader (which can also be found in your account) is same as your device, i.e. same capitalization, same spaces, etc. If it's different, contact them to get a code for the correct ID.
-Delete eReader off of your device to remove anything that might be corrupted and then reinstall it.
-Use their contact form at
http://www.ereader.com/support/contact to submit this problem to them once again.
I hope you can get this figured out.
TD