Pak Utility Flight Speed not working

I have Pak installed on a single player world and whenever I use the !fly [name] command to change my flight speed, nothing happens. Does anyone know how to fix this?

Solution

Also, to prevent any confusing behavior, if you had AGS flying enabled, it will still be toggled on/off by double-tapping space, IIRC, so you may want to go into AGS settings and turn off flying if you're using PAK. Doing so will not affect PAK's flying.