soap调用webservice报错,请高手帮忙解决！

Connector:Connection time out. HRESULT=0x800A1527 - Client:An unanticipated error occurred during the processing of this request. HRESULT=0x800A1527 - Client:Sending the Soap message failed or no recognizable response was received HRESULT=0x800A1527 - Client:Unspecified client error. HRESULT=0x800A1527   Connector:Connection time out. HRESULT=0x800A15