Error executing child request for ......

Question

Error executing child request for myhtmpage.htm. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Web.HttpException: Error executing child request for myhtmpage.htm. Why to xx.aspx is success to display my HTML page, but thisform1.action = "xx.aspx" has above error message ? Is anyone can explain and how solve this problem ? File submit.aspx <%@ Page Language="vb" %>
to xx.aspx File xx.aspx <%@ Page Language="vb" %> <% Server.execute("myhtmpage.htm") %> Thank ....