Jean,
For using VFP data on another machine(or with SQL/MSDE), you need to set it up in COM+ so that it can impersonate an account that has access to those things. Here's some instructions I used in the past:
On Windows2000, I went into Control Panel, Component Services:
1.)I right clicked COM+ applications and selected New.
2.)I went through the wizard, creating an Empty Application,giving it a name/check server application, and selecting the appropriate account to run under.
3.)After the Empty Application was created, I right clicked on 'Components' under the newly created application.
4.) I selected New/Component.
5.) The wizard starts and I select 'Import components that are already registered.'
6.) I selected your web service mtdll from the list and it was added to this COM+ app.
7.) I right clicked on the COM+ application name (in this case, your web service mtdll ) and selected 'Start'. The COM+ icon is now revolving in the Components pane.

>we have created a Web Service that access VFP Data and Applications located on the server using NTFS file system
>
>When Anaynomous User Connect the the Web Server, IIS authenticate the User ok, but Having a problem let the Anynomous User get access to the VFP DATA and APplications located on the NTFS file sytem.
>
>If we moved all VFP Data and APPlications under the IIS C Drive, then Anynomous user have no problem using the Web Service.
>
>but since we have to put the VFP DATA/Applications is somwhere on another server but not on the machine running IIS services
>
>Some code in the Web Service when executed, will trigger the following error:
> Error 1429 -OLE IDdisptach Exception code 0 from OleGrpCancellation.groupcacellation c:\prgs\oledatarequest.prg Error in line 217 File \\lrd1fil2\vfptest\icu\\appObject.app does not Exist.
>
>
>Does anyone know how to change any settings on IIS to enable an anynomous user to have Access to NTFS Resources just like an internal User have Access to these Resources.
>
>
>Thanks,
>Jean Haidar
>jjhaidar@arkbluecross.com
>jhjean2000@yahoo.com