WELL ! After having done many tests on my device ... MAYBE I've found the solution :-)
You can make a bootable CWM Recovery into your microSD.
1)Put a microSD into a Micro SD USB Adapter.
2)Format the microSD (I suggest you Gparted live version) ... leave the space unallocated.
3)Download & install Win32-image-writer.
4)Download CWM Recovery.img from the link below:
[Only registered and activated users can see links Click here to register]
5)Extract the image from the zip.
6)Open Win32-image-writer and write image into your microSD.
7)Put the microSD into your device.
8)Turn off your device and reboot by pressing the Power & Volume Up (or Down) buttons simultaneously ... and you'll enter into Recovery Mode.
Remember that into Recovery Mode you have to use the volume up & down to choose the action required ... and then press the power button to start the action required.
NOW you have a working CWM Recovery (tested with success into my device).
:-)