this is my HTML

```
<div id="formSuscription">
    <form class="form-inline">
        <div class="form-group">
            <input type="text" class="form-control" placeholder="First Name">
        </div>
        <div class="form-group">
            <input type="text" class="form-control" placeholder="Last Name">
        </div>
        <div class="form-group">
            <input type="email" class="form-control" placeholder="Email">
        </div>
        <div class="form-group ">
            <input type="button" class="form-control" value="Submit">
        </div>
        <div class="clearfix"></div>
        <center>
            <div class="form-group">
                <label>
                    <input type="checkbox" class="form-control" value="Submit"> DON'T SHOW AGAIN
                </label>
            </div>
        </center>
    </form>
</div>

```

image: <https://www.dropbox.com/s/mpa7rybvpngf19z/ohnails.png>
I can't post image, due to my reputation

How can I make for the button is full width?

I tried with:

```
style: display: block; width: 100%;

```

and

```
class btn-block

```

and

```
<div class="form-group btn-group-justified">
<input class="form-control btn-block" type="button" style="display: block; width: 100%;" value="Submit">
</div>

```

but not working