PHP-Soap Client exception Error Fetching http headers - call to WCF services

I created a simple Wcf service application with a function return a list of hotels object. My service using default web.config (basicHttpBinding ...), dont have apply Serialization object, i mean all is default config.

public class Service1 : IService1
{

    public List<Hotel> GetHotels()
    {
        Hotel objHotel = new Hotel();
        List<Hotel> result = objHotel.getListHotels();

        return result;

    }
}

public interface IService1
{
    [OperationContract]
    List<Hotel> GetHotels();
}

My results have template like this

        <Hotel>
           <Location>Moon</Location>
           <Name>Hotel 2</Name>
           <Rate>6 stars</Rate>
           <RoomList>
              <Room>
                 <Quantity>3<Quantity/>
                 <RoomName>Standard</RoomName>
                 <RoomType>Single</RoomType>
              </Room>
              <Room>
                 <Quantity>10<Quantity/>
                 <RoomName>Superior</RoomName>
                 <RoomType>Double</RoomType>
              </Room>
           </RoomList>
        </Hotel>

My client is PHP soapClient, It working fine when result return about 300 or 400 hotels. But got problem when the result return a large of data about 1000 hotels , client exception error is "Error Fetching http headers"

I dont know what reason, maybe the XMl result too long , content length over limit of Soap CLient ???

Please help, im a beginer with WCF