configured proxy server is not responding

24.128.33.61:2797
173.161.160.108:8888
71.141.131.233:2797
65.15.241.134:1080
117.241.81.30:1080
82.225.127.196:1888
59.39.92.148:1080
69.22.174.33:1755
66.31.94.194:3693
75.66.229.223:1205
174.52.70.186:2797
75.85.52.123:2333
41.194.60.4:80
98.204.106.85:5731
24.196.211.164:8085
190.211.132.28:8080
86.92.53.20:8080
180.183.97.221:3128
24.159.143.110:6448
68.110.207.34:1768
70.184.107.220:1665
194.160.76.5:80
203.202.255.67:8080
213.110.230.229:1080
95.160.157.192:8375
115.236.19.227:80
222.165.175.118:80
125.165.177.159:8080