Ubuntu 12.04LTS - Dash home application question mark icon

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http://askubuntu.com – I have installed PhpStorm application in my Ubuntu 12.04 but in the Dash Home (and in Dash Bar also) appears a Question Mark icon. I have tried to re-config the shorcut, but it not works (just the icon, the app open when I click it). Here is my *.desktop: [Desktop Entry] Version=1.0 Type=Application Name=JetBrains PhpStorm GenericName=JetBrains PhpStorm X-GNOME-FullName=Php Storm PHP IDE Exec="/opt/PhpStorm/bin/phpstorm.sh" %f TryExec="/opt/PhpStorm/bin/phpstorm.sh" %f Icon="/opt/PhpStorm/bin/phpstorm.png" Categories=Development;IDE; Terminal=false StartupNotify=true StartupWMClass=jetbrai (HowTos)