Events 5020 and 5006 on our Exchange 2010 SP2

We've migrated Exchange from 2003 SP2 to 2010 SP2, from old hardware to new hardware.
Since then we ahve this errors in Application log, how to get rid of this?

Event ID 5006

Cannot find route to Mailbox Server CN=E2003,CN=Servers,CN=First Administrative Group,CN=Administrative Groups,CN=IPC Organization,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=ipcck,DC=hr for store CN=Public Folder Store (E2003),CN=First Storage Group,CN=InformationStore,CN=E2003,CN=Servers,CN=First Administrative Group,CN=Administrative Groups,CN=IPC Organization,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=ipcck,DC=hr in routing tables with timestamp 22.9.2012. 13:39:15. Recipients will not be routed to this store

AND event ID 5020

The topology doesn't contain a route to Exchange 2000 Server or Exchange Server 2003 e2003.ipcck.hr in Routing Group CN=First Routing Group,CN=Routing Groups,CN=First Administrative Group,CN=Administrative Groups,CN=IPC Organization,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=ipcck,DC=hr in routing tables with the timestamp 22.9.2012. 13:39:15.

Our Exchange 2010 works well however I would like to clean this up.

Thanks,
Drazen