Hi,
Sorry but you did not mention the levels of the WBS in the screen print.
So I assume .1, .2, .3 are not the Root level WBS elements.
IM52 assigns the Budget only to the Root level. (already Completed)
To assign the budget to the lower level, please assign using CJ30 first and then move ahead with CJ32.
Hope it helps!
Thanks and Regards,
Varshal Kachole