PO Print Preview not working ??

Hi MM experts,

I am trying to view PRINT PREVIEW. but ts giving a message (No message found (please check your input)

if i click this i am getting this error message below.

No messages found (Please check your input)

Message no. ME230

Procedure

Enter 1 (processing successful) in the "Processing time spot" field if

you want to display the messages for this document that have already

been outputted.

i did all the customizing in Development server it s working good. but after transporting to Testing server its not working.

message is not creating automatically. if i create manualley i can view the print preview. but it s not creating message automatically. how to get automaticalley

Thanksin Advance,

Anthyodaya.