error in sample

[FlexPrashant]

HI i have read
http://www.adobe.com/devnet/flex/articles/coldfusionflex_part1_02.html


problem is that this sample is using flex data service 2.0
and i am using lcds2.5.1 as well as cold fusion 8 .

I am not aware with both the thing i am a very new in this
... Even i don't know how to how to configure flex builder for
using coldfusion 8 ...

I have followed all the instruction of this tutorial remember
i am using lcds2.5.1 as well as cold fusion 8 . I am confused of 2
points first the mapping " define a ColdFusion Mapping for /samples
" and second one thing where to deploy coldfusion file
Contact.cfc,ContactAssembler.cfc and where to flex mxml and as file
..



Finally i am getting error Could not initialize DataService.
error when ever i am running it
http://localhost:8700/samples/dataservice/contact/contactmgr.mxml


this .. Presently i have deploy coldfusion file in
C:\ColdFusion8\wwwroot and flex mxml files in
C:\lcds\jrun4\servers\default\samples..

Help me .. how do i can go ahead in this ..