Paste picture from clipboard

[ElmerS]

Hi,
Just installed Office 2010.
When I press PrintScrn or ALT+PrintScrn >> move to an open WB and try to Paste the picture (which is, probably, located in the Comp. Clipboard) into whatever sheet -
I get this error:"Microsoft Excel cannot paste the data".
Pasting into a "Word" Document works like charm.
More than that - when I copy that pasted picture (from inside the document) it "agrees" to be pasted onto the WB Sheet.
Does anybody any clue ?
I am aware that the 2010 is a fresh beta version, "still warm from the oven", but maybe one of you faces a similar problem in one of the previous versions.
Thanks,
Elm