Roger !
Great thanks, Kovid !
Now it works, going to the good target.
A kind question : this little detail, somewhat important (to consult the amazon page is positively a common usage for most of us when managing daily a book database), which consist to modify the name of the variable ("amazon_xx" instead of simply "amazon")... hum... this little detail, is it documented somewhere ? With the double help of Google and of the respective internal search engines I have looked over the triple whole domains "mobileread" and "calibre" and "bugs.launchpad.net/calibre/", and anywhere I haven't seen this modification to do (the "_xx") textually related. But maybe I have jumped over the right place... If not, it's certain that many people have the same frights I have got and so I think it could be pertinent to insert a little line about it in the manual (or at least in the immediate as a brief training update in the next changelog, just few words about this "_xx" which will relieve dozens of stressed users). Hum... in the bugs database it was
this page, wasn't it ?
Over ! To you, base !