How would I solve this error?

Exception Details: System.Web.HttpException: Control 'info_rver' of type 'TextBox' must be placed inside a form tag with runat=server.

I made a WebForm.aspx in asp.net and put a textbox inside the form. When I call the WebForm the error occurred. I also tried to removed the runat=server from the form tag but the textbox was deleted.


Pls Help!!!