PB with new RCM6700 minicore programming

Hi, I have already programmed many RCM6700 minicore on its interface board from Kit. Some month ago, I bought new RCM6700 kit (PN (1P) : 101-1327). When I use the same environment I used for the previous Kit I bought, It seems impossible to upload any code into the minicore (see image in attachment). With the same Interface board, if I replace the new minicore by an old one bought some years ago, it works perfectly.
I tried with another new Minicore (I bought 5 or 6 kits) , same problem, it doesnt work 
The only difference between the 2 minicore is the Product Number :

old one : 20-101-1318 D
new one : 20-101-1318 G

I suppose the suffix letter is the board revision. Is there anything specific to do in Dynamic C environment for programming and running the new minicore ?

I use the Dynamic C version 10.70 environment.

Thx for your help.