InfoPath Dev

Hi folks, I am new to sharepoint. I got a requirement to get currently logged in user information in sharepoint. I tried to implement UserProfile data connection in my infopath form. Everything goes well when i preview it. but after publishing the form i get an error as below: You do not have permissions to access a Web service that provides data required for this form to function correctly. An entry has been added to the Windows event log of the server. Log ID:5566 Correlation ID:01438357-abc8-44b9-aef3-69fdce2124e9 I know there is a need to check permissions on central admin. can anyone please provide me the steps to follow as i need to suggest these steps to the central administration. Thanks in advance.

 I'd forget the error to start with and ask, the area where the form is and where you're pull the data from, do you have access or more importantly who ever is filling out the form, do they?