Try this
.flex-control-nav {
background: none repeat scroll 0 0 #FFFFFF;
bottom: 127px !important;
display: block !important;
opacity: 0.66 !important;
padding: 10px;
position: absolute;
text-align: center;
top: auto !important;
width: 100%;
z-index: 999 !important;
}
.flex-direction-nav {
display: block !important;
opacity: 1 !important;
top: 30% !important;
width: 100%;
z-index: 999 !important;
}
.flex-direction-nav a {
color: rgba(0, 0, 0, 0.8);
cursor: pointer;
display: block;
height: 40px;
margin: 0;
opacity: 0;
overflow: hidden;
padding-top: 8px;
position: absolute;
text-shadow: 1px 1px 0 rgba(255, 255, 255, 0.3);
top: 50%;
transition: all 0.3s ease 0s;
width: 40px;
z-index: 10;
}