Merging of two Bex query not working

Hi,

I have two Bex report:

1.In one report we have field HFM account,G/L account,Actuals

2.In other report,we have a structure where we have restricted few HFM account,Actuals,G/L account.

Now when we are running these reports individually in BO,it is working fine.

But when we are trying to merge based on g/L account and trying to see structure and HFM account in the same report,it is not working.

Pls suggest

Thanks

Neetu