Error -2147221164 occurred at Class not registered

Hello,

When I tried to use Vls from the Report Generation Toolkit for Microsoft Office I got the following error message. I have installed Report Generation Toolkit for Microsoft Office with LabVIEWand whenever I try to place VIs from that toolkit on my block diagram I get Error -2147221164. Why is this happening and how can I fix it?

Thanks.

Error : Error -2147221164 occurred at Class not registered in NI_ReportGenerationTollkit.lvlib:ex_RGT_Get Bookmarks and Named Cells.vi->NI_ReportGenerationToolkit.lvlib:Configure MS Office Report.vi->NI_ReportGenerationToolkit.lvlib:Configure MS Office Report.vi.ProxyCaller This error code is undefined. No one has provided a description for this code, or you might have wired a number that is not an error code to the error code input.