Date field is not getting bound in form

I have a form in which if the flag is not editable then the date field is just displayed. If the flag is editable then the user picks a date. However when the form is submitted the date field is null,even if there was an existing date.

<c:forEach items="${company.companyLot}" begin="0" step="1" var="taxLot"    varStatus="Index">
<fmt:formatDate value="${company.companyLot[Index.index].lotDate }" type="date" pattern="MM/dd/yyyy" var="LotDate" />
<c:if test="${taxLot.editable eq 'nonEditable' }">
   <input type="hidden"  name="companyLot[${Index.index }].lotDate"   value="${company.companyLot[Index.index].lotDate }" />
   <input name="companyLot[${Index.index }].lotDate" value="${LotDate}" disabled="disabled"/>
   <form:errors path="companyLot[${Index.index }].lotDate" cssClass="displayErrorClass"></form:errors>
</c:if>
<c:if test="${taxLot.editable eq 'editable' }">
  <input id="lotDatePicker" type="text" name="companyLot[${Index.index }].lotDate" value="${LotDate}" maxlength="10"
style="width: 50px" />
    <input type="hidden"  name="companyLot[${Index.index }].lotDate"  value="${editDiscountNote.companyLot[Index.index].lotDate }" />
 <form:errors path="companyLot[${Index.index }].lotDate" cssClass="displayErrorClass"></form:errors>
 </c:if>
</c:forEach>

I have used hidden fields to pass the date but it doesnt seem to hold on to it in the modelattribute.