Thanks amigadave for your return !

"The emulators were installed to Sys: even though I specified a different directory during the install process."

I will verify that, there is a problem with the volume requester (a bug of MorphOS?), when i click on the defaut path selected, there is no selection of the path, i must select another volume and select the good one after for the selection have been effective.

Sorry for my bad english.