The version you have does not support IE9 or IE10 because they have not been created when that version was released. The first version to introduce official support for IE10 is Q2 2013 SP2 and I advise that you upgrade to the latest, currently Q1 2013 SP1 to get the most out of the suite.
Another option you can explore is forcing IE into IE8 mode by using the x-ua compatible meta tag
, yet I cannot guarantee this will have everything working as expected because this would still not be a real IE8, but a newer version attempting to emulate it.
All the best,
the Telerik team
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