facebook message on chat wont send with wi fi keyboard

hi guys im new to the forum i got a wi fi keyboard for my ipad it all works ok eacept when i go on to facebook and i type with the keyboard on the ipad everything is fine it all works but as soon a i connect my wi fi keyboard and go to chat on facebook the send botton diserpears and when ive typed what i want to say and pushed enter it goes onto another line why is that.

i will aprechate it if someone can help

is there a different key other then enter to send the message if not when in messages do i go to find settings or is there a website with different facebook send methods

is there a different key other then enter to send the message if not when in messages do i go to find settings or is there a website with different facebook send methods