从WCF Restfull服务错误调用方法 - ERR_CONNECTION_RESET

I'm facing a problem with a WCF Restfull Webservice, the problem is with one method the others are working correctly, then I think it isn't a general configuration problem. I have an idea of what could be the problem but actually I don't know how to solve it. The method have access to a third party webservice to retrieve an object of the following class:I'm facing a problem with a WCF Restfull Webser