I would like to take advantage of the upgrade to Vegas +DVD offer but when I enter my serial number into the order form it is not accepted. Is it because it is a Sonic Foundry version? If si is there a way to fix this?
Serial number for what? Which product are you upgrading from? SonicFoundry/SONY Media serial numbers are 20 letters in the form of xx-xxxxxx-xxxxxx-xxxxxx. If the number you are entering isn't in this format then you may be trying to use an activation code instead of a serial number.
I am trying to upgrade from Vegas 4. In "Help|About Vegas" on the menu bar I get read: "registered to "my name"" and a string of letters and numbers in this format xxxxxxxxxxxxxxxxxxxxxxxxxxx-xx.
That's right, the number in the help section isn't the serial number needed.
Something nobody's mentioned is that the serial number you're trying to input needs to be yours, and only yours. If this number has been used by someone else, I believe you'll be denied the upgrade.
I'm not trying to imply anything here, just saying that that's one reason.