Module Pool - POV

hi ,
I want to display a given set of nationalities(25/250) in the combobox of my module pool screen.
I hav used POV as follows .
process on value-request.
field P0002-NATIO module onvalue_land1.
MODULE onvalue_land1 INPUT.
data : GT_LAND TYPE T005T OCCURS 10 WITH HEADER LINE .
DATA GT_RETURN like DDSHRETVAL occurs 0 with header line.
call function 'F4IF_INT_TABLE_VALUE_REQUEST'
exporting
retfield = 'NATI0'
dynpprog = sy-repid
dynpnr = sy-dynnr
dynprofield = 'P0002-NATIO'
value_org = 'C'
tables
value_tab = GT_LAND
return_tab = gt_return
exceptions
parameter_error = 1
no_values_found = 2
others = 3.
While running my Combo box is blank .
Wht could be the problem ?
Any help would be much apperciated .
Regrds,
J

Yes now am able to  display the given fields in my List box . i hav used 'VRM_SET_VALUES' .
Now , While saving ....it's not converted to it's key automatically .
ex .. If i save the nationality "Swiss" it takes the two char SW and it's saving . But the actual key is "CH".
Am getting the following error status.
"entry - SW - doesn't exist in your check entry "
How to find the check entry .I hav used ,
SELECT * FROM T005T INTO TABLE I005T_LONG
           WHERE SPRAS = SY-LANGU
           AND ( LAND1 = 'IN' OR LAND1 = 'SW' )
Surly i will reward points to u all .
help plz .
Regrds ,
J
Message was edited by: P079223

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