Some css elements are not working in IE11

I have the following block in my css which is working pretty fine with the chrome, but not working at all with with IE11 (In IE11 I get just white empty block):

#button-login {
        float: right;
        margin-right: 20px;
        margin-top: 20px;
        width: 80px;
        height: 30px;
        font-size: 14px;
        font-weight: bold;
        color: #fff;
        background-image: -webkit-gradient(linear, left top, left bottom, from(#acd6ef), to(#6ec2e8));
        background-image: -moz-linear-gradient(top left 90deg, #acd6ef 0%, #6ec2e8 100%);
        background-position: right;
}

#button-login:hover {
        background-image: -webkit-gradient(linear, left top, left bottom, from(#b6e2ff), to(#6ec2e8));
        background-image: -moz-linear-gradient(top left 90deg, #b6e2ff 0%, #6ec2e8 100%);
        background-image: linear-gradient(top left 90deg, #b6e2ff 0%, #6ec2e8 100%);
}

#button-login:active {
        background-image: -webkit-gradient(linear, left top, left bottom, from(#6ec2e8), to(#b6e2ff));
        background-image: -moz-linear-gradient(top left 90deg, #6ec2e8 0%, #b6e2ff 100%);
        background-image: linear-gradient(top left 90deg, #6ec2e8 0%, #b6e2ff 100%);
}

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I believe that:
     background-image: -webkit-gradient()
        background-image: -moz-linear-gradient()

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Is not working in IE11, but I am not sure how to fix it.
Ashraf HassaneinAsked:
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GaryCommented:
For IE10+ you need to add -ms-linear-gradient declaration for the background-image

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Ashraf HassaneinAuthor Commented:
Thanks that was indeed the problem thanks for your help.
Ashraf HassaneinAuthor Commented:
Very helpful support
GaryCommented:
You'll be an HTML/CSS maestro before you know it.
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