c# - Keyboard Shortcut Not Working with VSIX Installer -

i've created vsix package, , i've added keybindings section in .vsct file. when run experimental instance of visual studio, keyboard shortcut works, when install vsix package on machine, keyboard shortcut doesn't work, despite other aspects of addin working. there else stopping shortcut binding properly?

the key bindings

<keybindings>         <keybinding guid="myaddincmdset" id="cmdidrollback" editor="guidvsstd97" key1="vk_numpad2" mod1="control"/>          </keybindings> 

the command in vspackage

commandid commandidrollback = new commandid(guidlist.myaddincmdset, (int)pkgcmdidlist.cmdidrollback);                 menucommand menuitemrollback = new menucommand(menuitemcallbackrollback, commandidrollback);                 mcs.addcommand( menuitemrollback);