delete .Trash in USB sticks

[oxy]

Hi all,

I wanna delete this .Trash from my usb stick:

> rm -rf /media/xxx/.Trash-1000
   rm: cannot remove `/media/xxxx/.Trash-1000/files/.Trash-abc/def (copy)/ghi':
        Read-only file system
> chmod a+rw /media/xxxx
> rm -rf /media/xxx/.Trash-1000
   rm: cannot remove `/media/xxxx/.Trash-1000/files/.Trash-abc/def (copy)/ghi':
        Read-only file system

How to do that?

thx ...