F4 help for prospect in search view

Hi,

While creating a lead in webUI, I am getting F4 help for campaign and I am able to search properly for campaign in the F4 help.

But for prospect, I am able to obtain the F4 help but unable to find the prospects when I search in the F4 help.

It says 0 records found. But for campaign, it shows many available campaign IDs

I find the coding different from the F4 help of prospect when compared to that of the campaign.

May I know the code or how to obtain the right F4 help for the prospect with available prospects...

Thanks

Madhukar