You may try one of the below and stick to what works for you:
1. Changes to Report Properties
go to Project
and in General
and change the set the following options to:
TargetReportPartFolder: [Virtual Diretory of Report Manager URL] TargetServerURL: http://YourReportURL /[Virtual Diretory of Web Service URL]
2. Set the report server url Right-click on the solution in the Solution Explorer and click on Properties. Change the TargetReportFolder value to something you wish and provide the TargetServerURL as http://yourserver/reportserver (not jus t /report). Press save. Now right-click on the solution again and select Deploy. When it finishes open the url http://yourserver/report (not /reportserver). Go ahead and click on Test.Reports (or whatever you specified as TargetReportFolder ) and then click on your test report. You will be greeted with the web version of your report. change the security settings for connecting to the data source. In the report page, click on Properties > Data Sources . Change the “Connect using ” to “Credentials stored securely in the report server” and specify an account that has access to the data. Also check “Use as Windows credentials…”.
You may wish to change the Subscriptions if required!