报错信息：
2017-01-04 11:03:20 [scrapy] DEBUG: Retrying (failed 1 times): TCP connection timed out: 10060: 由于连接方在一段时间后没有正确答复或连接的主机没有反应，连接尝试失败。.
2017-01-04 11:03:22 [scrapy] DEBUG: Retrying (failed 2 times): Connection was refused by other side: 10061: 由于目标计算机积极拒绝，无法连接。.
在Proxiesmiddleware中代码：
class ProxiesMiddleware(object):
def process_request(self,request,spider):
proxy=random.choice(proxies)
request.meta['proxy']=proxy
其中proxies是从西刺代理爬下来的高匿IP，在settings中也设置了：
'scrapy.contrib.downloadermiddleware.httpproxy.HttpProxyMiddleware': 110,
'Sully.middleware.ProxiesMiddleware': 100,
求助各位大大该怎么去改
