PeeBus
Thanks for the input. I read the troubleshooting guide which suggested that the problem might occur when the install is not run by an administrator. I retried in admin mode but nothing changed. I copied and pasted directly from my account page at Cakewalk.com so the serial number is correct.
Please forgive my question, but your wording was a little unclear in my read.
You indicated 'retried in admin mode'. Did that mean you were signed on to a user account that has administrator privileges, or did you explicitly right-click on the Sonar launch icon and click on 'Run As Administrator'?
I ask, because the above are 2 different things. You want to do the second option, explicitly right-clicking on the Sonar launch icon and then clicking on 'Run As Administrator'. This will give you more privileges than simply logging on to an account that is an administrator type. (It has to do with a higher level of privileges granted in an 'execution token' that is created with the 'Run As Administrator' mode of execution.)
So, IF you hadn't done the above, and tried the above, and it didn't work, then perhaps you could try one more thing: copy and paste the serial number and/or registration code into Notepad, and then copy it back into the clipboard from there and paste it into the appropriate spot in Sonar. I have seen in the past where some flakiness with formatting prevented proper evaluation of serial numbers and such, when copied from a web page, and using the Notepad trick stripped off the weirdness and then it worked fine when pasted in after running it through Notepad.
I hope any of the above gets you up and going.
Bob Bone