inteaction with ms project server using PDS

hi,
i am developing an MIS application which would interact with microsoft project server 2003
using Public data Services (PDS) via SOAP(simple object access protocol) and XML.

now,the problem is that i have developed a VB application (for trail purpose only)
that is able to connect to project web server 2003 successfully BUT when i ask for or fire
a project status request

it returns me status as 0 that is success but does not show me any projects that r there
at my project server

another interesting thing is that when i give projectid of a project
1
it returns project info of the projectid from table MSP_project in the SQL Server
but all my actual projects r in MSP_WEB_Projects table in sql server

kindly send me your advice as to what is going wrong
and any code or other material u have regarding automation of project server usin PDS API's