Well,i'm able to answer my problem/question :
my mistake was to format the sd card using R-link tools : DON'T !!
Formating the sd in the 1005 did the trick.
Made a test with France's' map and Lufop's "danger warnings" : works great !!
Will put the needed maps on the 8Gb Sd and no maps internally , at least till i find a way
to add poi's to the internal maps.
Have fun.