hello,
first i would like to say that UddeIm is a great PMS and hope will be more and more flexible in the future. Unfortunately i need do a little change, but i'm not a programmer I just need hide compose button for registered users, only admin will compose messages. Please, give me some advice what change in code to get that solution. I will be very grateful. Best regards.

Thats not done by a quick fix. It might be able to hide the button when the access rights are not high enough but you need several additional checks to ensure that nobody can send a message.

In 1.2trunk I have enabled the possibility that registered users can be blocked to send messages to other registered users (currently only groups with higher access rights can be blocked).

Thanks Slabbi for the answer. I sent you PM, please let me know what You think about my proposition.