Hi Sonakshi,
Pls have a look at following:
http://help.sap.com/saphelp_crmscen70/helpdata/en/43/32f13c81600d2ee10000000a1553f7/frameset.htm
section: "Replication of materials".
Make sure you follow each step.
I'm assuming that connection between systems works fine i.e. you are able to load other objects.
Let me know how it works for you,
regards,
Kornel