Problem with billing due list VF04

Hello,

We are facing a problem, when we invoice some contracts which has sevaral billing plans for future months, and then run VF04 in the next month to check the billing due list, we dont see these contracts, however these are relevent for billing and can be invoiced, but not shown in VF04.

Has anyone faced a similar problem like this?

Thanks in advance for your help.

Anirban