Can I use two different datsets in list

I created an list in that we placed an matrix and i ma using one dataset for
all of it anf grouped the list with one id called org name.
Now for each org we have answers associated and its an different dataset wen
i try to insert it. It provides errors.
As we got grouping in it and in grouping when we use other data set
information it gives as First(Field!xyz.value,datsetname) which gives
aggregate function exception or error.
How do we resolve it.Issue resolved by sub report.
"NAVIN.D" wrote:
> I created an list in that we placed an matrix and i ma using one dataset for
> all of it anf grouped the list with one id called org name.
> Now for each org we have answers associated and its an different dataset wen
> i try to insert it. It provides errors.
> As we got grouping in it and in grouping when we use other data set
> information it gives as First(Field!xyz.value,datsetname) which gives
> aggregate function exception or error.
> How do we resolve it.