CRM 2013 legacy CRMwebservices An unexpected error occurred.

Today I was trying to run a legacy application which was used by our team to create new leads in CRM from a website. however every time I send a request I returned me with lot of errors I tried every possibility however no success and I was getting following message.

 

0x80040216   An unexpected error occurred.   Platform

upon further investigation I come to a point where I got following error

System.Web.Services.Protocols.SoapException The Microsoft Dynamics CRM 4.0 (2007) Web service endpoint is not supported in this release

this error lead me to a situation where I found the resolution of my problem., actually

The 2007 service endpoint was deprecated in the Microsoft Dynamics CRM 2011 release. Extensions that use the 2007 endpoint will not be supported and will not work in the next major release of Microsoft Dynamics CRM. Note the following more detailed information:

• Microsoft Dynamics CRM Online customers using the Microsoft account identity provider can continue to use extensions that require the 2007 endpoint after upgrade. However, prior to the transition of your organization to Microsoft online services (MOS), you will need to upgrade or remove those extensions that require the 2007 endpoint. For more information about this transition, refer to the Microsoft Dynamics CRM Transition Center.
• Microsoft Dynamics CRM Online customers using the Microsoft online services (MOS) identity provider will see no change in service. The 2007 endpoint has not been supported in organizations using the MOS identity provider.
• When Microsoft Dynamics CRM 2011 on-premises and IFD customers try to upgrade their server to the next major release of Microsoft Dynamics CRM, the upgrade process will detect extensions that are using the 2007 endpoint or legacy Microsoft Dynamics CRM 4.0 features. If any of these extensions are found, the Environmental Diagnostic Wizard will report an error and you will not be able to continue the upgrade until those extensions are removed or upgraded to use the 2011 endpoint.
http://msdn.microsoft.com/en-us/library/dn281891.aspx

this simply means we have upgrade out application to meet new standards by Microsoft.