Keep experimenting with it and not just sit and wait for someone else to solve your issue.
Search Mercury CSO and see if there is a KBA relating to this issue in the past
showing the full code you are doing
All of which are valid paths to continue with this.
Also, have you checked your application to see if what you are trying to type is accepted as you expect? Using a analog statement could also cause issues. Have you tried using a Context Sensitive statement instead?