mrtg cfgmaker 에러

snmp 최신버전으로 설치하고 mrtg 컴파일후

cfgmaker 실행했는데 SNMP Error가 납니다.

./cfgmaker --global 'WorkDir: /home/chongmu/tan/mrtg_ch' --global 'Options[_]:bits,growright' --output /home/ch
ongmu/tan/mrtg_ch/conf/mrtg.cfg public@61.36.22.129 
--base: Get Device Info on public@61.36.22.129:
SNMP Error:
receiving response PDU: 연결이 거부됨
SNMPv1_Session (remote host: "61.36.22.129" [61.36.22.129].161)
                  community: "public"
                 request ID: 37369878
                PDU bufsize: 8000 bytes
                    timeout: 2s
                    retries: 5
                    backoff: 1)

몇시간째 해봐도 안되네요. T.T

도움을 기다립니다.