To explain further, I have a pagetype (lets call it Standard Page) which has a property of ListingHeading (an XHTML string). The listing itself which this property applys to is within a web user control (lets call it listing.ascx). The ListingHeading is displayed properly simply by using the following syntax inside the Listing.ascx file:

<EPiServer:Property PropertyName="ListingHeader" ID="ListingHeader" runat="server" />

However when I enter DOPE mode, this property is not available for editing (unlike the other Property controls that are included on the Standard Page).

Is there any way (apart from moving parts of the Listing.ascx template into the StandardPage.aspx) to make this property editable?
(I have searched but I may not have been looking inthe ight place so even a hint would be great!)