Requisition Import Exceptions Report:Preparer is not an on-line user

Hi Experts,

Reqimport program is not importing requisitions from external source. Requisition import exception report is showing following error:

Transaction  Column Name        Error Message

------------ ------------------ ---------------------------------------

         3001 PREPARER_ID        Preparer is not an on-line user

                                 Cause:        The preparer must be an

                                 on-line user if the requisition is

                                 unapproved.

                                 Action:        Make the preparer an on-

                                 line user.

                                 Action:        Enter a preparer who is

                                 also an on-line user.

         3002 GL_DATE            GL date is not in a valid period

                                 Cause:        GL date must be in a

                                 valid period if encumbrance is ON.

I have checked GL, purchasing, inventory and payables period, all are open.