Never mind I found the solution - I replaced web.config entries with this - you guys should have this in your documentation!!!
>Trying to get one of your demo's running but the page won't render correctly. Show's blank images with red 'X'. After adding:
to web.config I get:
Could not load type 'Syncfusion.Web.UI.WebControls.Diagram.DiagramRenderHandler' from assembly 'Syncfusion.Diagram.Web, Version=6.303.1.8, culture=Neutral,PublicKeyToken=3d67ed1f87d44c89'
tried removing this dll from gac & re-inserting control which copied the dll to my bin folder but still the same problem. If I can get this working we may buy this product.
Thanks