Photomatix HDR problem

[Howski]

I was combining +/- 2 exposure shots today and being relativity new to this HDR lark I messed up - although I don't know how . All I did was use tone compressing to help bring out the details in an image and this happened to the sky

Any idea how (other than cut&paste) can I sort this out? What did I do wrong?
-How.

 

[Howski]

Well like I said I had exposure bracketing on @ 2 stops either side. The sky would never look good anyway in the shot as it was 100% overcast. I'll have a play with the clipping and see what happens.
Cheers
-How.