默認選中的複選框不會在點擊時切換

我正在使用Reactjs。我正在使用Modal from react-bootstrap創建Modal表單。我使用bootstrap創建了一個表單。該表格包含默認情況下需要檢查的複選框。所以我使用checked屬性作爲輸入複選框。但是當我點擊它時，複選框不會切換。我無法弄清楚這個問題。這裏是我的代碼：默認選中的複選框不會在點擊時切換

<Modal show={this.state.showModal} onHide={this.closeModal}> 
<Modal.Header closeButton> 
    <Modal.Title>Create New User</Modal.Title> 
</Modal.Header> 
<Modal.Body> 

    <form class="form-horizontal" name="newUser"> 
     <div class="form-group"> 
      <label class="control-label col-md-4" for="userName">User Name</label> 
      <div class="col-md-6"> 
       <input type="text" class="form-control" id="userName" ref="userName" placeholder="User Name"/> 
      </div> 
     </div> 
     <div class="form-group"> 
      <label class="control-label col-md-4" for="password">Password</label> 
      <div class="col-md-6"> 
       <input type="password" class="form-control" id="password" ref="password" placeholder="Enter Password"/> 
      </div> 
     </div> 
     <div class="form-group"> 
      <label class="control-label col-md-4" for="password">Confirm Password</label> 
      <div class="col-md-6"> 
       <input type="password" class="form-control" id="confirmPassword" ref="password" placeholder="Re-enter Password"/> 
      </div> 
     </div> 
     <div class="form-group"> 
      <label class="control-label col-md-4" for="email">Email Address</label> 
      <div class="col-md-6"> 
       <input type="email" class="form-control" id="email" ref="email" placeholder="Email Address"/> 
      </div> 
     </div> 
     <div class="form-group"> 
      <div class="col-md-offset-4 col-md-6"> 
       <div class="checkbox-inline"> 
        <label><input type="checkbox" id="enabled" ref="enabled" value="enabled" checked/> Enabled </label> 
       </div> 
       <div class="checkbox-inline"> 
        <label><input type="checkbox" id="locked" ref="locked" value="locked" /> Locked </label> 
       </div> 
      </div> 
     </div> 
    </form> 
</Modal.Body> 
<Modal.Footer> 
    <Button onClick={this.submitUser} bsStyle="primary">Confirm</Button> 
    <Button onClick={this.closeModal} bsStyle="warning">Cancel</Button> 
</Modal.Footer> 
</Modal>

這裏是。提前感謝您的幫助。