If you'd read through the thread you posted the link to you would have found what appears to be the answer to the problem:
"To
solve, I went to the "Signing" tab of the project properties and
unchecked "Sign the ClickOnce manifests"."
Jim Perry - Microsoft XNA MVP
If people spent a minute
searching the forums and reading
the FAQs before posting I'd be out of a job.
Got some XNA Game Studio/XNA Framework development info to share with the community? Put it on the
XNA Wiki.
Please mark posts as Answers or Good Feedback when appropriate.