Email Sending Autoit Script Working Well In WIndows 7 But Not Running Working In Windows Xp

I Get Autoit Script To Send Email Through SMTP This Script Is Working Well In WIndows 7 Buts Gives The Following Error In Windows Xp :

"Error: The Requested Action With This Object Has Failed."

I Also Use Custom Autoti Error Function And I Attach Image Of Autoit Custom Error Function's

Result:

I Also Upload The Script File..

Error Start From This Line:

$objEmail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/sendusing") = 2

 

Please Help

Thanks In Advance..

Regards

Hussnain