Double rtl8139 in Windows CE 6.0 R2

Hello everyone!
I have a problem:
I have a board which integrates 2 RTL8139s, and I'm trying to build a
CE6R2 image which correctly manages everything.
The image I built only shows one connection (which corresponds to the
second RTL8139 on the board!!!), and there is no way to see the other
one.
I read many posts in this group and everyone is speking about some
[HKLM/Drivers/BuiltIn/RTL8139] or [HKLM/Drivers/BuiltIn/RTL81391] or
[HKLM/Comm/RTL8139] keys and so on in platform.reg, common.reg or
project.reg. The problem is that when I add from the tree in Catalog
Item View the RTL8139, nothing changes in my files, except that in
common.reg I find a [HKLM/Comm/RTL8139], without any subkey and with
DisplayName, Group and ImagePath parameters.
Is there someone who can tell me what do I have to do? Do I have to
manually add some registry keys?

Thanks to everyone who will read my post!!!
And many thanks to everyone who will answer my question!!! :)

Giulio
.