Two near-identical fields - one saves, one doesn't

Hi,

I';ve created two very similar fields as follows - one ois called 'amount', one is called 'covers':

<div class="form_item">
  <div class="form_element cf_textbox">
    <label class="cf_label" style="width: 150px;">Amount (in pounds)</label>
    <input class="cf_inputbox validate-number" maxlength="150" size="30" title="Numbers only" id="amount" name="amount" type="text" />
  
  </div>
  <div class="cfclear"> </div>
</div>

<div class="form_item">
  <div class="form_element cf_textbox">
    <label class="cf_label" style="width: 150px;">Payment valid for (in months)</label>
    <input class="cf_inputbox validate-number" maxlength="150" size="30" title="Numbers only" id="covers" name="covers" type="text" />

The form is linked to table jos_chronoforms_payments; both fields appear in the table, with the names "amount" and "covers". Both are of type "varchar(255)", and yet, when i enter data into the form, the 'amount' always appears in the database, yet 'covers' never does.

Have i missed something really obvious here? (this is what usually happens). Please help!

many thanks

OK, it's working now, no idea why! sorry to take up your time...

many thanks