Could not load file or assembly 'System.Data.dll' or one of its dependencies.

Hi,

We have some trouble when we try to get response from WCF service. We get the below error.

Could not load file or assembly 'System.Data.dll' or one of its dependencies. Either a required impersonation level was not provided, or the provided impersonation level is invalid. (Exception from HRESULT: 0x80070542)

We also tried to implement the logic as mentioned on the post http://support.smartbear.com/viewarticle/9029/ but still we have this error.

Any ideas/suggestions to get rid of this error?