Do I need a different product?
I bought GoLive to Dreamerweaver upgrade. Did not remember GoLive was part of my CS purchase and not a stand-alone product.
If you look in the download, install help, there is a page that describes common upgrade serial number problems. Yes, it seems as though you bought the wrong product, because upgrades are from suites to suites or from standalone to standalone only, according to that page. Probably need to call about return/exchange.