Asset Upload

hi,

Regading Asset upload, client is ready to give the details as on 31.01.2008. Now what are the steps to be done for Asset upload?.What is the previous year to be maintained in

1.Specify the transfer data/Last Closed fiscal year

2.Specify last period posted in Previous system

I am trying to upload the data through T.Code AS91.

Can any one guide me on this.

govind.