Facing a strange problem while accessing SSRS reports on AX 2012

Hi All,
I am facing a strange problem while accessing SSRS reports on AX 2012.
We are having 6 AOS for our AX environment, out of that 2 are load balancers and other are normal AOS. Databases and model store of all AOS is same. I have successfully deployed SSRS reports over AX environments.
Sometimes SSRS reports are visible, sometimes not. They show an error” Configuration id could not be found in SSRS tables”.I have done all the configurations related to SSRS tables.
But upon restarting of SSRS services report continues to run but after sometimes they stopped.
Has anybody face such situation or has a way to resolve it…

Thanks in Advance…

Aman Gupta