Ext.ux.menu.StoreMenu - Ajax Store as menu-item config

[wm003]

You should change the baseparams and set the loadingstate to false just after the user value has been changed

var msm = Ext.getCmp('myStoreMenu');
msm.baseParams = {userTXT: userValue,                mailTXT : emailValue};
msm.loaded=false; 

the next time the menu is shown it will be forced to reload the itemconfig.