update your css with this:
.button_new{
border:1px solid #fab32f;
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
border-radius: 5px;
font-size:12px;
font-family: arial, helvetica, sans-serif;
padding: 0px 8px;
text-decoration: none;
display: inline-block;
color: #a60201;
-webkit-font-smoothing: antialiased;
background: #fccd78; /* Old browsers */
background: -moz-linear-gradient(top, #fccd78 0%, #f8b030 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#fccd78), color-stop(100%,#f8b030)); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, #fccd78 0%,#f8b030 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, #fccd78 0%,#f8b030 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, #fccd78 0%,#f8b030 100%); /* IE10+ */
background: linear-gradient(to bottom, #fccd78 0%,#f8b030 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#fccd78', endColorstr='#f8b030',GradientType=0 ); /* IE6-9 */}
.button_new:hover {
background: #f8b030; /* Old browsers */
background: -moz-linear-gradient(top, #f8b030 0%, #fccd78 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#f8b030), color- stop(100%,#fccd78)); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, #f8b030 0%,#fccd78 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, #f8b030 0%,#fccd78 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, #f8b030 0%,#fccd78 100%); /* IE10+ */
background: linear-gradient(to bottom, #f8b030 0%,#fccd78 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#f8b030', endColorstr='#fccd78',GradientType=0 ); /* IE6-9 */
}