Pivot table data source keeps referring to old file name

Hi,

I am using Excel 2013 on Windows 8

I create a table, and insert a pivot table that use this table as data source

I close the excel and rename the file from "myfile.xlsx" to "newfile.xlsx, and then open it again

When trying to refresh my Pivot Table, I get the following Error:

"We couldn't get the data from 'Table1' in the workbook 'C:\myfile.xlsx' Open this workbook in Excel and try again."

i.e. it is still looking for table using the old file name.

I need to update the file every week, so having to manually go back and change source file name for every pivot is very time consuming and painful for me :-(

Please investigate and advise how to fix this ?