extjs - window does not close with close() method -

very strange problem still not understand why. have grid , on columndblclick open window. window works fine, submit data when try close window, not close.

saverefresh : function() {              this.win.close(); <---------------------------execute fine.              this.grid.getview().refresh();     }, 

above coding works fine , not raise error. refresh grid , grid shows saved data. how not close window. have click "save" button 3 times close window.

any idea why follow strange behaviour??

many thanks.

we use window.hide(). makes more sense in cases anyway:

saverefresh : function() {      this.win.hide();      this.grid.getview().refresh(); }