MS Outlook MAPI Script Error - There is no default mail client

Hi Experts,

I've developed MAPI Script for Outlook Monitoring.

Outlook is set up & is made as the Default client in the machine.

While running the script,  I get the error as attached,

When I click on OK, I get the below error in VuGen.

Error -87001:Failed to logon for Outlook2010 (rc = -2147467259).

Vugen: 11.52

OS: Windows Server 2008 R2

Outlook: 2010

Please help me to resolve this issue.

Thanks & Regards,

Ashok