Excel - Automation Object Error

Please, “Gurus de lo insondable”, i have a code with same errors…

When i run Notes to Notes work fine, but in WEB …

Set Excel = CreateObject( “Excel.Application” )

'(Work Fine, i installed Excel in Server and pass Ok.)

Excel.Visible = True '(Don’t work)

Excel.Workbooks.Add '(Don’t work)

Set xlWorkbook = Excel.ActiveWorkbook '(Work ok)

¿Where can i check if the class need to run this code are loaded in the server?.. .

Please, i need your help…

Thanks… Muchas Gracias…