Upgrade with Wix

Question

I tried nearly all solutions list on page How to implement WiX installer upgrade? , but didn\'t upgrade successful. always prompt this message when I was upgrade:

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Answer 1

To make a package perform a major upgrade you must increase its ProductVersion and change the ProductCode.

You can read about different types of upgrades here: http://msdn.microsoft.com/en-us/library/windows/desktop/aa369786(v=vs.85).aspx