Recurring invoicing - how do I create items lines in the format: from 01-02-2011 to 01-05-2011

Recurring invoicing - how do I create items lines in the format: from 01-02-2011 to 01-05-2011

hello,
 
I would like to use recurring billing - but I have some issues to configure the Item lines on the invoice.
 
1st Invoice:
service from 01.02.2011 to 01.05.2011
 
2nd Invoice:
service from 01.05.2011 to 01.08.2011
 
Etc
 
Anyone how can I advise me how I do this ?