I did uninstall it with --purge option and install it again, and it now works fine !
The result of `dpkg -l flashplugin-nonfree|grep ^ii` gives :
ii flashplugin-nonfree 9.0.48.0.0ubuntu1~7.04.0 Adobe Flash Player plugin installer
I did uninstall it with --purge option and install it again, and it now works fine !
The result of `dpkg -l flashplugin- nonfree| grep ^ii` gives :
ii flashplugin-nonfree 9.0.48. 0.0ubuntu1~ 7.04.0 Adobe Flash Player plugin installer