ActiveX component can't create object: 'Excel.application'

[sandya]

jest i wrote below four lines of code
it though error ==================
The test run cannot continue due to an unrecoverable error.

ActiveX component can't create object: 'Excel.Application'

Code:

Line (1): "".
==================================
Dim XLApp
   Set XLApp = CreateObject("Excel.Application")
           XLApp.Visible = True
           Wait(5)

please help me and Guide me