Can't select a Lead (only contact) when adding a call in Activity

Can't select a Lead (only contact) when adding a call in Activity

Hi,

I have created an activity (chase Mr X on Project Y).
Mr X is a Lead.
When I go into Activity -> Leads/Contacts -> Click on Activity -> Add call
I fill out the form but there is a dropdown for Lead or Contact, whichever I choose selects my list of contacts and NOT leads.

Any ideas please.

Thanks

Richard