material ledger issue

Hi all ,

We have configured material ledger in our SAP systems, but haven't used it till now.Now when we want to run CKMH-single leve material price dtermination, it throws an error saying that the previous period has to be closed.This error occurs for all the periods starting from the go live date.Now even if we want to run the T-code for all the previous periods,it say we can run this T-code only for current and its previous period only and not for all the previous periods.

Now my question is there any way to close all the previous periods, and run the CKMH for just the previous and current periods?OR is there any other solution?

plz help me

Neha