auto po mrp

dear sirs,

i have created

material code and have activated Auto PO indication in purchasing view, mentioned MRP view and VB MRP type with Re order qty and all

activated both the tick related to Auto PO in purchasing data in vendor master

created info record

created source list

through MD03 run the MRP, and PR also get generatd as per Re-order point

but when i run the ME59N, auto PO generation i am getting not suitable PR found.

what fields have to be selected in ME59N?

why i am not in a position to create the PO>?

is there any configuration setting to be done for Auto PO?