Not able to pass internal table from prog to wf

HI ALl,

I am trying to pass data if an internal table using followiinng programme.Can anybody guide me why internal table is not getting passed as a multiline event parameter?

REPORT

ZTEST_WF.

include <CNTAIN>.

data:
objkey type sweinstcou-objkey,
objtype type sweinstcou-objtype,
event type sweinstcou-event.

data: SWC_CREATE_CONTAINER.
data: SWC_SET_TABLE.
data:swc_container.

data: wa_mara type standard table of mara.

select * from mara into table wa_mara UP TO 10 ROWS.

swc_container it_cont.
swc_CREATE_CONTAINER IT_CONT.
SWC_SET_TABLE IT_CONT 'zmara' WA_MARA.


objtype = 'ZSA_BO'.
event = 'ZSA_EV'.
objkey = ' '.

CALL FUNCTION 'SAP_WAPI_CREATE_EVENT'
EXPORTING
object_type = objtype
object_key = objkey
EVENT = event
COMMIT_WORK = 'X'
* EVENT_LANGUAGE = SY-LANGU
* LANGUAGE = SY-LANGU
* USER = SY-UNAME
* IFS_XML_CONTAINER =
* IMPORTING
* RETURN_CODE =
* EVENT_ID =
TABLES
INPUT_CONTAINER = IT_CONT
* MESSAGE_LINES =
* MESSAGE_STRUCT =

.