Dynamic Image Binding(Image Filed)

Requirement:

--We  have one URl where images are stored Lets say :  http://abc.com/XYZ.jpg

-- We need to send this image in our PDF

Envirnoment.

-- We are using ADOBE LCES 8.2.1 SP2 ,UNIX envirmoment

What we tried

1)Created Adobe Form xyz.XDP inside that we have created imageField

2)Created mapping with XSD and associated with this image field using data binding

3)created LCA file (attached )  and passing xml data  but its not working

Please suggest wheather we are going right

Or there is other way to do it

Also I have been observed that when I used image filed  and keep the form properties for preview as "static xml form" in desgigner it works fine but if I  used the "Dynamic xml form"  then it didnt work.

This issue is on very high priority in my devlopment. so any helping hand would be very grateful.....