Using MAPIsession in VB

I am developing a COM object to automate send/receive of emails using MAPI. The program works fine but prompts me to select a profilename everytime it is called. Is there anyway to suppress this and let the program pick the default profilename. My mail tool is Microsoft Outlook 2000. During debugging it pops up the window to select the profilename and in their there is a option to set the selected profilename as the default name but it still keeps popping up inspite of checking the option. Any information on this ASAP will be appreciated.

Thank You