I can't seem to find any documentation or code samples on how to add a hyperlink to a cell in Excel 2007 using the open xml sdk 2.0. I am using the following code, but is there a step I am missing?

WorksheetPart workSheetPart = ExcelUtilities.GetWorkSheetPart(mWorkBookPart, "Program");

workSheetPart.AddHyperlinkRelationship(new Uri("http://www.google.com", UriKind.Absolute), true);

workSheetPart.Worksheet.Save();

mWorkBookPart.Workbook.Save();

Then when I try and open the Excel document it says the file is corrupted because the relationship Id for the hyperlink cannot be found. How do you setup or create that relationship Id?