Hi,

Kentico CMS does not allow you to use several form tags on one page (only one is allowed). There is already one form tag used on the page therefore inserting another form tag into page, you creates following code:

<form runat="server"> //kentico
<form method=""post>//your
</form> //your
</form> //kentico

As you can see this in not what you would like to achieve.

If you would like to post data from your form control you can use one of following ways:
1. use iframe and insert the whole page code into it
2. use webclient class to post data instead of form control. You can find an example here: http://www.netomatix.com/httppostdata.aspx

Best regards,
Ivana Tomanickova