Flash Download for AC800 PEC PP D113

Hi,

I have a controller AC800 PEC PP D113, in which i want to do the flash download. I know that i have to create the image file in control builder and then i have to download the flash from PEC Tool.

But when i am doing this procedure, program is getting downloaded in the flash, but after reboot, controller is going into fault mode. And the strange thing is, even in fault mode the controller is going online in control builder.
And after rebooting the controller for the second time after flash download, the controller is not going in online mode and is asking for a cold download of the controller.

Please correct me if i am following the wrong steps or please tell me what can be done to rectify this problem.

Regards
MAJ