Web.Mail << Could not create 'CDONTS.NewMail' object.

I get some error when sending mail :(

I used the commands before (on other pc and network)
But when i try to run the following simple mail script ,
i get the error
Could not create 'CDONTS.NewMail' object.

Is it a .NET component thats not installed right or has it something to do with the mailserver.

Before i used this script on a simple SMTP Mailserver. Now im running it on a Exchange server thats behind firewalls and routers.

As sender and receiver i use my own email address, so that should be right.

Code:

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                        Try
                            _SMTP.SmtpServer = "mail.domain.com"
                            _SMTP.Send("[email protected]", "[email protected]", "test", "testing")
                        Catch e As Exception
                            MsgBox(e.Message)
                        End Try

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If anyone can help me with this, please mailto: [email protected]

I need the sollution for this ASAP