Messages Not Always Sending

Hi I'm having problems with my text messages not sending,I'm running air droid on my galaxy note 2 which is running a probam rom. Android is version 4.3

Basically whenever a message is rather long up to 200 characters+ it fails to send so I have to break that message up into smaller messages.
Is there a fix?

Many thanks.

Thanks for your feedback and sorry for the inconvenience this might have caused.
Your issue might caused by the custom ROM. We will add an option to split the long SMS into multiple SMS in next update to solve this problem.