Microsoft Transaction Server

I have built a component using Visual Basic that runs the DHCPcmd.exe command. The component runs from an ASP page. I have added an IDENTITY to the Package for the component, but when the command excutes I am getting the following error :

DHCP Server version 5.5
DhcpEnumSubnetClients failed, 5.
Command failed, 5.

This error indicates that the User defined in the IDENTITY does not have access to the database accessed with the DHCPcmd.exe. Is there something else I need to do here. Thanks