Bxslider not working

Bxslider not working

I'm implementing bxSlider in a rails app, I'm having trouble making it
work, so far my issue is transition is not working instead appear each one
below the other. Can you point me what I'm missing?
HTML:
<!--BxSlider-->
<ul class="bxslider">
<li>
<%= image_tag "header1.png" %>
<div class="row text-center">
<div class="span10 offset1">
<h1>Tittle one</h1><br />
<a class="btn-main" href="about.html">Learn More</a>
</div>
</div>
</li>
<li>
<%= image_tag "header2.png" %>
<div class="row text-center">
<div class="span10 offset1">
<h1>Tittle 2</h1><br />
<a class="btn-main" href="about.html">Learn More</a>
</div>
</div>
</li>
</ul>
CSS:
/** RESET AND LAYOUT
===================================*/
.bx-wrapper {
position: relative;
margin: 0 auto 60px;
padding: 0;
*zoom: 1;
}
.bx-wrapper img {
max-width: 100%;
display: block;
}
/** THEME
===================================*/
.bx-wrapper .bx-viewport {
-moz-box-shadow: 0 0 5px #ccc;
-webkit-box-shadow: 0 0 5px #ccc;
box-shadow: 0 0 5px #ccc;
border: solid #fff 5px;
left: -5px;
background: #fff;
}
.bx-wrapper .bx-pager,
.bx-wrapper .bx-controls-auto {
position: absolute;
bottom: -30px;
width: 100%;
}
/* LOADER */
.bx-wrapper .bx-loading {
min-height: 50px;
background: url(bx_loader.gif) center center no-repeat #fff;
height: 100%;
width: 100%;
position: absolute;
top: 0;
left: 0;
z-index: 2000;
}
/* PAGER */
.bx-wrapper .bx-pager {
text-align: center;
font-size: .85em;
font-family: Arial;
font-weight: bold;
color: #666;
padding-top: 20px;
}
.bx-wrapper .bx-pager .bx-pager-item,
.bx-wrapper .bx-controls-auto .bx-controls-auto-item {
display: inline-block;
*zoom: 1;
*display: inline;
}
.bx-wrapper .bx-pager.bx-default-pager a {
background: #666;
text-indent: -9999px;
display: block;
width: 10px;
height: 10px;
margin: 0 5px;
outline: 0;
-moz-border-radius: 5px;
-webkit-border-radius: 5px;
border-radius: 5px;
}
.bx-wrapper .bx-pager.bx-default-pager a:hover,
.bx-wrapper .bx-pager.bx-default-pager a.active {
background: #000;
}
/* DIRECTION CONTROLS (NEXT / PREV) */
.bx-wrapper .bx-prev {
left: 10px;
background: url(controls.png) no-repeat 0 -32px;
}
.bx-wrapper .bx-next {
right: 10px;
background: url(controls.png) no-repeat -43px -32px;
}
.bx-wrapper .bx-prev:hover {
background-position: 0 0;
}
.bx-wrapper .bx-next:hover {
background-position: -43px 0;
}
.bx-wrapper .bx-controls-direction a {
position: absolute;
top: 50%;
margin-top: -16px;
outline: 0;
width: 32px;
height: 32px;
text-indent: -9999px;
z-index: 9999;
}
.bx-wrapper .bx-controls-direction a.disabled {
display: none;
}
/* AUTO CONTROLS (START / STOP) */
.bx-wrapper .bx-controls-auto {
text-align: center;
}
.bx-wrapper .bx-controls-auto .bx-start {
display: block;
text-indent: -9999px;
width: 10px;
height: 11px;
outline: 0;
background: url(controls.png) -86px -11px no-repeat;
margin: 0 3px;
}
.bx-wrapper .bx-controls-auto .bx-start:hover,
.bx-wrapper .bx-controls-auto .bx-start.active {
background-position: -86px 0;
}
.bx-wrapper .bx-controls-auto .bx-stop {
display: block;
text-indent: -9999px;
width: 9px;
height: 11px;
outline: 0;
background: url(controls.png) -86px -44px no-repeat;
margin: 0 3px;
}
.bx-wrapper .bx-controls-auto .bx-stop:hover,
.bx-wrapper .bx-controls-auto .bx-stop.active {
background-position: -86px -33px;
}
/* PAGER WITH AUTO-CONTROLS HYBRID LAYOUT */
.bx-wrapper .bx-controls.bx-has-controls-auto.bx-has-pager .bx-pager {
text-align: left;
width: 80%;
}
.bx-wrapper .bx-controls.bx-has-controls-auto.bx-has-pager
.bx-controls-auto {
right: 0;
width: 35px;
}
/* IMAGE CAPTIONS */
.bx-wrapper .bx-caption {
position: absolute;
bottom: 0;
left: 0;
background: #666\9;
background: rgba(80, 80, 80, 0.75);
width: 100%;
}
.bx-wrapper .bx-caption span {
color: #fff;
font-family: Arial;
display: block;
font-size: .85em;
padding: 10px;
}
JS:
<script>
$(document).ready(function(){
$('.bxslider').bxSlider({
mode: 'fade',
auto: true,
pause: 4000,
autoHover: false,
touchEnabled: true,
adaptiveHeight: false,
autoControls: false
});
});
</script>
Error:
Uncaught TypeError: Object [object Object] has no method 'bxSlider'