I guess you do not see the styling in the design mode and the reason for the error is the fact that since Q3 2011
all existing skins, except Default
, are moved to a separate skins assembly(Telerik.Web.UI.Skins.dll
You should manually add the Telerik.Web.UI.Skins.dll assembly in the Bin folder and reference it. Additionally, you may need to restart your VisualStudio project to reflect the changes.
The breaking change
is listed in the release history notes
for Q3 2011. You can also read more about it in this blog post
I hope this helps.
All the best,
the Telerik team
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