I'm developing new email template and I'm trying to create modules. When I run the validation, an error comes up about the id being invalid. At first I thought maybe I duplicated the id, but that was not the case. Below is the code for the table any suggestions would be greatly appreciated.
<table border="0" cellpadding="0" width="600" class="mktoModule" id="header" mktoname="Header" align="center">