[tac_plus] socket 23 error?

[fedora fedora]

Hello list,

I have the newest tacacs-plus installed on my ubuntu 8.04 64bit server
and i noticed the following error messages constantly showing up in my
logs,

Does anyone know what exactly caused this? and how can i fix this?
much appreciated!

tacacsd[386]: %SECURITY-TACACSD-6-SERVER_DOWN : TACACS+ server
x.x.x.x/49 is DOWN - Socket 23: Resource temporarily unavailable

Regards

FD
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