Problem in executing L_TO_CONFIRM

Hi Experts,

I need to Confirm Transfer Order via BAPI

I am using L_TO_CONFIRM.

I am passing following IMPORT PARAMETERS

I_LGNUM - warehouse number

I_TANUM - transfer order number

I_QNAME - syuname

I_ENAME  -syuname

I_COMMIT_WORK = X

TABLES

T_LTAP_CONF

    1.TANUM  - transfer order number

    2.TAPOS  -transfer order item

    3.ALTME  - unit of quantity

    4.LENUM - source storage unit

    5.PICKM  - quantity

    6.CHARG - batch

    7.NLPLA  - destination storage bin

When im executing the bapi  it displays :

Runtime:        13,112 Microseconds

Exception       ITEM_NO_SU_BULK_STORAGE

Message ID:          L3                         Message number:           310

Message:

No storage units confirmed for item 0001

Can anyone help me in this regard??