Notes ToolBar overlaps my Addin Toolbar

hi,I have inserted my Toolbar in bookmark.nsf using COM interfaces.

The problem is when first time my add-in is installed, It is hidden beneath the first Notes Toolbar that appears after Notes default toolbar.

after i manually drag this first Notes Toolbar that hides my toolbar then my addin toolbar appears…from then onwards it works fine…

Can anyone tell me some soultion to this.