New Agents are not receiving existing WorkItems

[Balasubramaniam, Swaminathan]

Hi,
We have a Workflow which uses a Role to route Workitems to corresponding
agents. The Role basically looks at the workcenter and grabs all the agents.
 
 
Whenever a new agent is added to the workcenter, all existing workitems
which are still in ready status does not reflect the new agent. However, any
new workitem created gets routed to the new agent. How can I fix this issue
for existing workitems, which are in ready status?
 
 
TIA
Swami