Problem in rendering Reports after upgrade AX 2012 R1 to AX 2012 R2

We are successfully able to deploy the SSRS report server on new AX 2012 R2 machine after upgrade process. While trying to run few standard reports for unit level testing, we found that all the standard and customized reports are coming blank. When searching on internet, we found following work around and we tried below mentioned various methods to resolve the problem:

• Restarted SSRS service

• Configured reporting and analysis extension once again

• Removed and added analysis and reporting extension

• Added fresh report server database

• Checked all the user rights on all database and reporting services

• Debug the code in DP(data provider), controller and contract classes

When we try to dig more, we see that CUSTTRANSLIST report is working on machine. There are lot of other which are not rendered. We are not sure what to do.

We have contacted Microsoft support team, they are researching on the same. Please help us if anybody is aware of this.