REgistration not working on IE

<span class="greska">[+wlpe.message+]</span>
<div id="wlpeRegister">
	<form id="wlpeRegisterForm" name="wlpeRegisterForm" action="[~[*id*]~]" method="POST">
		<fieldset id="wlpeRegisterFieldset">
			<p class="wlpeRegisterInfo">Unesite vašu email adresu, vaše ime, te željeno korisničko ime u donja polja.</p>
		  <p class="wlpeRegisterInfo">Lozinka i upute za aktivaciju vašeg korisničkog računa biti će poslani na vašu email adresu.</p>
			
<table width="300" border="0" cellspacing="0" cellpadding="0">
  <tr>
    <label for="wlpeRegisterFullName"><td>Vaše ime i prezime:</td>
    <td> <input type="text" id="wlpeRegisterFullName" name="fullname" /></td> </label>
     </tr>
  <tr>
   <label for="wlpeRegisterEmail"><td>Vaša email adresa:</td>
    <td><input type="text" id="wlpeRegisterEmail" name="email" />
      </td></label>
  
  </tr>
  <tr>
    <label for="wlpeRegisterUserName"><td>Željeno korisničko ime:</td>
    <td><input type="text" id="wlpeRegisterUserName" name="username" /></td> </label>
  </tr>
    <tr>
    <label for="wlpeRegistermobilephone"><td valign="top">Broj mobitela:<br /><em> (potrebno radi nagradnih igara)</em></td>
    <td> <input type="number" id="wlpeRegisterMobilephone" name="mobilephone" value="[+post.mobilephone+]" />  <br /></td> 
    </label>
     </tr>

</table>
			
		</fieldset>
		<fieldset id="wlpeRegisterButtonFieldset">
			<button type="submit" id="wlpeRegisterButton" name="service" value="register">Registriraj me</button>
		</fieldset>
	</form>

</div>