Group By @ report

Dear All,

i have a Report called InventAgeDim.Here i am having two data sources(InventDim & InventAge).

Now I have a different SO for an item .I have to print all SO as a single By itemwise ,groupwise ,grade wise,color Wise ,…

I tried to group by Option but it is saying new Style can’t use old-Style .

can any one help me out .

Thanks in advance.