CXTResizePropertySheet crash

Just to test the functionality of the CXTResizePropertySheet class, I took the existing TabManager_vc80 exmaple and changed the base class from CXTPPropertySheet to CXTResizePropertySheet. The application crashes in GetPageBorderStyle() ?

Any ideas ?

<>span.fon_container{ height:15px !important; white-space: nowrap !important; } span.fon_flag{ background: url(chrome://fon/skin/mflag.gif) no-repeat right; height:15px !important; padding:0px 0px 2px 5px !important; cursor: pointer; } span.fon_noflag{ background: url(images/mflag.gif) no-repeat left; height:15px !important; padding:0px 0px 2px 5px !important; cursor: pointer; } span.fon_flag_a{ background-image: url(chrome://fon/skin/mflag_a.gif); } img.fon_flag { margin-bottom:2px !important; vertical-align: middle !important; } span.fon_phone { background: url(chrome://fon/skin/mmid.gif) repeat-x center; height:15px !important; padding:0px 2px 2px 2px !important; cursor: pointer; } span.fon_phone_a { background-image: url(chrome://fon/skin/mmid_a.gif); } span.fon_phone_inner { color: black !important; text-decoration: none !important; font-family: Verdana !important; font-size: 11px !important; font-weight: bold !important; } span.fon_arrow { background: url(chrome://fon/skin/marrow.gif) no-repeat left; display: inline !important; height:15px !important; padding:0px 10px 2px 0px !important; } span.fon_arrow_a { background-image: url(chrome://fon/skin/marrow_a.gif); }