Error in my CSS? Unknown @ rule: @-ms-keyframes
<p>I am trying to add a moving picture banner onto my website with some basic pictures. I don't need anything fancy, just want a slideshow feel. I don't want to have to download any third party software or get crazy with my code, so I looked to this stackoverflow question to help me write my CSS:</p>

<p><a href="https://stackoverflow.com/questions/30032646/smooth-infinite-scrolling-banner-css-only">Smooth Infinite Scrolling Banner [CSS Only]</a></p>

<p>Here is the CSS that I am using:</p>

<pre><code>.container {
    width: 100%;
    overflow: hidden;
    margin: 10px auto;
    background: black;
}

.photobanner, .photobanner2 {
    height: 233px;
    width: 3550px;
    margin-bottom: 5px;
    font-size: 0;
}

.photobanner img, .photobanner2 img {
    margin-bottom: 10px;
    margin-right: 5px;
    height: 233px;
    width: 350px;
}

.photobanner img  {
    -webkit-transition: all 0.5s ease;
    -moz-transition: all 0.5s ease;
    -o-transition: all 0.5s ease;
    -ms-transition: all 0.5s ease;
    transition: all 0.5s ease;
}

.photobanner img:hover {
    -webkit-transform: scale(1.2);
    -moz-transform: scale(1.2);
    -o-transform: scale(1.2);
    -ms-transform: scale(1.2);
    transform: scale(1.2);
    cursor: pointer;

    -webkit-box-shadow: 0px 3px 5px rgba(0,0,0,0.2);
    -moz-box-shadow: 0px 3px 5px rgba(0,0,0,0.2);
    box-shadow: 0px 3px 5px rgba(0,0,0,0.2);
}
/*keyframe animations*/
.first {
    -webkit-animation: bannermove 30s linear infinite;
       -moz-animation: bannermove 30s linear infinite;
        -ms-animation: bannermove 30s linear infinite;
         -o-animation: bannermove 30s linear infinite;
           animation: bannermove 30s linear infinite;
}

@keyframes "bannermove" {
 0% {margin-left: 0px;}
 100% {margin-left: -2125px;}
}

@-moz-keyframes bannermove {
 0% {margin-left: 0px;}
 100% {margin-left: -2125px;}
}

@-webkit-keyframes "bannermove" {
 0% {margin-left: 0px;}
 100% {margin-left: -2125px;}
}

@-ms-keyframes "bannermove" {
 0% {margin-left: 0px;}
 100% {margin-left: -2125px;}
}

@-o-keyframes "bannermove" {
 0% {margin-left: 0px;}
 100% {margin-left: -2125px;}
}
</code></pre>

<p>The HTML is very simple</p>

<pre><code>&lt;div class="container"&gt;
    &lt;div class="photobanner"&gt;
        &lt;img class="first" src="images/photo_17"&gt;
        &lt;img src="images/photo_15"&gt;
        &lt;img src="images/photo_16"&gt;
    &lt;/div&gt;
</code></pre>

<p></p>

<p>I am using GoDaddy to host my website. When in my .css file, it shows an error next to my @-ms-keyframes "bannermove" line. It says that there is an unknown @ rule. I am wondering if I need to include something to fix this error? Any help would be appreciated and I can go into more detail with my other files if needed.</p>