Error occourd "perhaps it's code was not linked in, or the calss wasn't registered with Register_Class"

[Mad Lion]

I've created my new application which exactly works llike UDPBasicApp, When I run my simulation in ini file, it shows me following error.

Note: 1) I've also added Register_Class(UDPReplyBasicApp) function at the eend of .h and .cc file.

         2) I've also added Define_Module(UDPReplyBasicApp) function at the start of my .cc file.