First, thanks for feedback.
Now I should be the Mantis coordinator and we have now a 5.2 project for made bug reports.
I send another mail asking for how to have a easy mail send from inside Squeak.
Take my ail about soundsEnabled as proof of collecting info for made a Mantis report.
The error comes from importing my old SmartTrashMorph, a long time ago when you throw some morph on Trash a sound is produced.
SoundService soundEnabled is which we have now , so no bug only need change old code>