求助windows2003做林的扩展时出现错误

要把windows 2003 R2上的域控迁移到windows 2008 R2，在windows 2003运行adprep /forestprep时出现如下错误提示：" z# o7 |4 x! d% ~5 o8 H
The schema master did not complete a replication cycle after the last reboot. The schema master must complete at least one replication cycle before the schema c1 F) T: Q- U# a1 A* Z# k
an be extended.
6 j0 U' W' F/ C; o5 g& o[User Action]9 }4 \7 s* }( P+ E
Verify that the schema master is connected to the network and can communicate with other Active Directory Domain Controllers.  
% f. k: g/ {1 A2 UUse the Sites and Services snap-in to replicate between the schema operations master and at least one replicationpartner. After replication has succeeded, run adprep again.
- P8 m$ t; d* V5 M3 _! Z$ ~请高手相助！！！8 k7 \+ y8 o$ @! D7 G

4 H8 v0 N* u( |3 I, u[ 本帖最后由 vpn007 于 2011-7-31 20:29 编辑 ]

你的网络环境如何？域环境如何？有没有子域、有几台域控？你在那台上面操作的？& _6 E/ H6 V7 P, _
依提示看你的域控之间的复制有问题！