[Geany-Users] Problem with Set Custom Command

I have a problem with Edit-> Format-> Send Selection to ->Set Custom Command

I am trying to sort some lines of text in Geany. So I did Edit->Format->Send Selection to->Set Custom Command and then ->Add

I got [1.][Tick, or √ sign] I typed 'sort' and then ->OK

The word 'sort' disappeared

And Edit->Format->Send Selection to says "no custom commands defined"

Same thing happens if I run Geany under sudo and whether or not I have selected some text before starting

What am I doing wrong? I am running Geany 0.21 under Ubuntu 12.04

Richard H