13.0.2 is not supproted with VS 2012. You need atleast 13.0.5.
I would suggest you to upgrade to SP 10. (13.0.10.)
http://scn.sap.com/docs/DOC-7824
Could you elaborate what exactly do you mean by
if I fill dummy parameters in report preview and file path of report dataset file
Does your application use datasets to pass the data to the report?
The error is self explanatory. Logon failed. which means the report tried to connect to the DB or tried to fetch the data or didnt get the data from Dataset and it failed before the export.
Could you make sure that you are passing the DB logon info to main report and subreport as well.
Thanks,
Bhushan