reply to cost loading thread?

you all saying we can do it with RA.

But I have tried nothing comes up in P3 after i set costs from Excel sheet which is provided by P3 in CD.

1.I have imported activity data into activity infromation sheet.
2.I copy and paste activity ID into cost sheet and entered resources ID and cost.
3. I pressed set resources assignment costs.
4. In P3 resources can be assigned but no cost have been imported.

Please help.

Thanks