Error while getting userprofile details using webservice

Hi All,

I want to get Userprofile details using webservice but when I try to run GetUserProfileByName I am getting below error.

"Fault Exception was un handeled"
"The User Profile Manager object could not be loaded. ---> No User Profile Application available to service the request. Contact your farm administrator."

I did searching on google and came to know that I need to start User Profile Service Application I am getting error. After that I try to change farm account to solve this problem  but getting below error.

Error deploying administration application pool credentials. Another deployment may be active. An object of the type Microsoft.SharePoint.Administration.SPAdminAppPoolCredentialDeploymentJobDefinition named "job-admin-apppool-change" already exists under the parent Microsoft.SharePoint.Administration.SPTimerService named "SPTimerV4".  Rename your object or delete the existing object.

So please tell me how to solve this problem as I want to get userdetails using webservice.

Thanks in advance.

Regards,

Kaivan Shah