I use Excel 2013 and Power View and SQL Server 2008 R2.
After create my Data Source and my chart in
I fix it with this way :
According to This biography , It says :
I had the same problem, it's incredibly annoying and there's strangely little posted about it on the interwebs. Anyway, here's how you fix it:

Also ran into that. It seem, after running the Document Inspector in Excel, it will show you this warning whenever you save your file.
Go to File > Info and click in "Allow this information to be saved in your file". The next time you save there should be no more warning.
