CLI problems when using rt help example

When I try to use the example given to add a new ticket here is what happens:

cdavis@chrisweb ~]$ rt create -t ticket subject=‘new ticket’ priority=10 \

add cc=foo@example.com
rt: edit: Unrecognised argument ‘subject=new ticket’.

The only way I can get a new ticket to be added is to leave everything blank so that I get a blank ticket number 4,5,etc.

Carl