Actions fail to work properly in Photoshop CS6

Hello,
I am using Photoshop CS6 with Windows 7, 64 bit on my laptop. I am attempting to use actions that require an image to be opened, selected, copied and closed and then this image in the clipboard must be pasted on to another Photoshop image that is already opened. I had whole of this action working perfectly in Photoshop CS5 but coming to CS6, I get this error saying ‘Command paste is not available’. I tried out the same 8-bit images in CS6 that I used in CS5 and still this does not work. What is going wrong in CS6? I have not changed any preferences. Is there any new setting in CS6 that I have inadvertently not set? Please suggest. I am eagerly awaiting your suggestions to get this thing working. Thanks in advance for the solutions offered.

The command “paste” is not currently available.
