Problem with Date field

in function module i call the program using "submit" command, the syntax is:

submit ZSD_RG1_REG exporting list to memory

with WERKS = WERKS

with BUDAT-LOW = BUDAT_LOW

with BUDAT-HIGH = BUDAT_HIGH

with MATERIAL-LOW = MATERIAL_LOW

with MATERIAL-HIGH = MATERIAL_HIGH

and return.

i enter the values in FM for the fields in following ways werks = 1810 material_low = fet000075 and budat_low = 02.04.2005

now the result i get is selection-screen of the report where all the fields are filled except for the budat-low field which is showing blank.

Whereas i should'nt get the selection-screen of the report itself. What could be the error pls help me.