*pre-tension with solid elements

hello,
thnx a lot for you help.
i have now one more question:
for my calc. with pre-tension i have to make 2 steps for my calc…
so i tried to do these:

*STEP
*STATIC
*CLOAD (pre-tension)
1001,1,10
*END STEP
*STEP
*STATIC
*CLOAD (pre-tension)
1001,1,-10
*END STEP

and the result should be zero, but these is not working!?

wbr