[Freeswitch-users] Failed to create a udp socket on port 5060

I m trying to play some basics on FreeSwitch plus twinkle softphone. Following error msg is displayed on the softphone: Failed to create a udp socket on port 5060. Address already in use & following on freeswitch window: X Error: BadWindow (invalid Window parameter) 3   Major opcode:  20   Minor opcode:  0   Resource id:  0x30001be Plz help me solving this.                             faisal