Disclaimer: Modifying the registry can cause serious problems that may require you to reinstall your operating system. We cannot guarantee that problems resulting from modifications to the registry can be solved. Use the information provided at your own risk.
Check your registry to see if the entry HKEY_CURRENT_USER\Software\Bewley Carlaw\Coral120\Setting\ExcelIsInstalled is set to -1.
If the above setting is not present, or not set to the value -1 then one of the following is required depending on the version of Excel installed :
For Excel 97: HKEY_LOCAL_MACHINE\Software\Microsoft\Office\8.0\Excel\InstallRoot
For Excel 2000: HKEY_LOCAL_MACHINE\Software\Microsoft\Office\9.0\Excel\InstallRoot
For Excel XP(2002): HKEY_LOCAL_MACHINE\Software\Microsoft\Office\10.0\Excel\InstallRoot
For Excel 2003: HKEY_LOCAL_MACHINE\Software\Microsoft\Office\11.0\Excel\InstallRoot
Note that these settings should be checked on the computer that is running the Ascent application.