Sharepoint Infopath Form GetUserProfileByName Connection Error

I have a form that try to get the user profile data using  a web service
suddenly the form stopped working with this type of error when trying to retrieve the data:

An error occurred accessing a data source.
An entry has been added to the Windows event log of the server.
Log ID:5566

this error only occur for a user , other user dosn't have this error , I tried to finc solutions on the web , but all of them didn't work

only one user have this error , I tried to give him full control over the site , but still the same , I think it is a permission problem.

any help will be appreciated.
LVL 1
RawasiAsked:
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Shailaja KumarCommented:
Have you tried the resolution provided in the following link?
http://urenjoy.blogspot.com/2009/03/error-occurred-accessing-data-source.html
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RawasiAuthor Commented:
Thanks very much for your help , I actually tried this solution before , I also tried it now too again
but no result

any other ideas ????
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RawasiAuthor Commented:
Hi
I created a new Web Application and it worked fine with me , the other user is able to get the right infomation , but it is difficult for me to move to the new Web Application , so I think the problem is related to Web Application Configurations ,

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