Please find attached a sample page that demonstrates changing the checked status of a CheckBox
RadButton. You can verify that the button control is checked and unchecked correctly, depending on the Boolean value, passed to the client method set_checked
My suggestion is to check the value that is returned from myMasterTable.get_selectedItems().getDataKeyValue('IsFemale')
as most probably it is causing the unexpected behavior. Please refer also to this article
, explaining the principle for setting the value of a Boolean object. Note that if you pass a string "false" the value of the variable will be true
I hope that helps.
the Telerik team
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