Hi,
My problem was solved.I don't know exactly how it was solved.But I thougth that the setup can't find the file that in the Paint.Net/Staging directory.The file called "PaintDotNet"+ and some random numbers and msi is the extension of it.If you saw a warning like "A network error occurred while attempting to read from the file: C:\Paint.net\Staging\PaintDotNet_806950639.msi
"
* Change the name of file like what is writing on the warning.
I hope to not struggle again a problem like this.