How can I programmatically update outlook meeting with ASP.NET meeting?

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VB

ASP.NET

Outlook

I have created a vb.net class library to create and cancel outlook meeting requests to users with the help of URL : This Link Can any one help me how to update those calendar entries or which method to be passed for updating the saved meeting entry, I have tried with method "Update" but that doesn't remove the previously added meeting from calendar and add new meeting request into calendar. Need urgent help. Thanks in advance.

What I have tried:

I have tried with method "Update" but that doesn't remove the previously added meeting from calendar and add new meeting request into calendar