Rounded corners CSS_html/css_WEB-ITnose

The rounded corner code is tested normally on my computer. When I put it on the server, Chrome works fine, but IE 9 has no effect. It’s strange

    width:200px;            height:300px;            -webkit-border-top-right-radius: 0px;            -webkit-border-bottom-right-radius: 0px;            border-top-right-radius: 0px;            border-bottom-right-radius: 0px;            border: 1px solid rgba(0, 0, 0, 0.2);            border-bottom-color: rgba(0, 0, 0, 0.3);            border-right-color: rgba(0, 0, 0, 0.3);            -webkit-border-radius: 6px;            -moz-border-radius: 6px;            border-radius: 6px;            background-color: #ffffff;            -webkit-box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.2);            -moz-box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.2);            box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.2);

Reply to the discussion (solution : >

?Is anyone here??

Is it related to the server? No way!

Is it a DOCTYPE problem? It may be related to IE's compatibility mode.

IE9 should be valid, please check whether it is switched to "compatibility" mode.