@ioa747 :
Sometimes it may happen, that the forum editor reacts a bit oddly. The best solution in this case is to enter the names again.
As @dan_555 already wrote, a selectbox should pop up.
Edit : @ioa747
For example, it does not work when inserting text from an external editor .
This looks to be Web-based. You might want to look into IUIAutomation MS framework automate chrome, FF, IE, .... - AutoIt Example Scripts - AutoIt Forums (autoitscript.com)
Alternatively, you may just be able to Send("Col") if the field is selected by default.