ok, I found the solution.

Modifiyng he TAGSET in SAS and add in the head section of the Html the code
below :

style type="text/css"
table {
mso-displayed-decimal-separator: "." ;
}
</style

The numeric fields with decimals are made in SAS with the format xx.xx
(point) and excel change it into a comma (",") in both case (open excel and
load the .xls file or double-click on the .xls file).

Thanks to all