Problem on Clicking on radio button using UI automation

Is there a property to click on a radio button using UIautomation

The problem is selecting the on the radio button i am unable to see the further actions that is performed , as the client is performing

i am using this code to detect the radio button and selecting it:

AutomationElement AlignmentradioButtonPASS = GetTextElement(appElement1, "rdBtnPass");

if (AlignmentradioButtonPASS != null)
                        {
                            xmlWriter.WriteElementString("PASS_Contrast_Pattern", "Tests");
                            xmlWriter.WriteString("Click on Contrast Pattern Button and PASS Radio Button");
                            SelectionItemPattern AlignradioCheckPass = AlignmentradioButtonPASS.GetCurrentPattern(SelectionItemPattern.Pattern) as SelectionItemPattern;

                            AlignradioCheckPass.Select();

.....

}

In my client application the moment i click on the radio button that particular grid is getting highlighed, but in my script on select it is not getting highlighted

Any suggestions or solutions please help