Safety stock different in MC.9 and MM03

Hi,

I have a problem, we have changed safety stock of one material on 6.6.2008 from 1000 Nos to 500 Nos. Now when I see in MM03 it is coming 500 Nos. But in MC.9 it is coming 1000 Nos.

What may be reasons. I am not able to understand. Is MC.9 is considering safety stock of 01.06.2008.

What should we do.

Full rewards for helping answers.

GR