Terry,
I solve the error, I put in the pages
<%@ Page Language="C#" EnableViewStateMac="false"%> and it works fine.
But now I have another error. The file upload into the temp directory but it has the name uploadingXXXXX.resx ... and it not was copy... and the name does not change to persisted.XXXXX.resx
Here are the screens, first the screen with the error. And second is a capture of the FTP, so you can see the name of the file