GUI scripting-select menu item in Mail's Styles popupbutton

Question

Hi,
The following script complies without returning an error.
In Mail, with a new message window displayed, the Styles sheet displayed (select Format>Style>Styles...), and the Favorite Styles radio button selected, the script below returns an error when it gets to the line "click pop up button item 'Bold'" (the menu does contain an item "Bold!").
I'd prefer to select the menu item by name rather than by using keystrokes in the script because I will be adding styles to the Styles menu, which will result in changes in the numbering of items in that menu.
Could someone please explain to me how to accomplish this?
Thanks in advance!
tell application "System Events"
tell application process "Mail"
tell first window
tell first sheet
tell first radio group
tell radio button 2
click
end tell
end tell
tell pop up button 1
click
click pop up button item "Bold"
end tell
end tell
end tell
end tell
end tell

Answer 1

When you click the pop up button, the result is a menu, so you will need to click an item of that menu - for example:
tell pop up button 1
      click
      click menu item "Bold" of menu 1
end tell