MRP out put issue

Dear All PP gurus,

I am having one issue regarding MRP as below

We encounter one item 1.03424.0009 x 6 , which system did not prompt us to buy on 30.03.09 after MRP run .

Can you please advise why ?

strategy is 40,MRP type PD ,Lot size is MB,Availability check ZC,Procurement type F.

Means what my problem is that why the system didnot prompt to buy yhis item on 30.03.2009?

Thanks,

Narayan