Executing external programs in Windows from UNIX

Hi all,
I would like to call an external program in Windows box from UNIX box. I tried to create a command in SM69, specify the command and OS type to Windows. When I try to execute the command in SM49, I got an error 'program_start_error'.
I tried also to create an RFC destination in SM59, using connection type = T (start external program via TCP/IP), specifying the program in the Program field and specify the Windows box hostname (or IP add) in the Target host. But this also seemed could not work.
Is there any other ways I could do this?
Thank you.
Mizwan

RSBDCOS0 Execute UNIX commands. 
Look at SM69, SM49 and
Function SXPG_COMMAND_EXECUTE
e.g. SM69
Press F5 or click Change button
Press F6 or click Create
Fill in the following parameter :-
Command name - the unix scripts file name e.g. ZABAPFTP
Operating system command - e.g. sh
Parameters for operating system command - e.g. /sap_production/usr/sap/trans/data/zabapftp.sh
REPORT ZABAPFTP.
data : t_btcxpm like btcxpm occurs 0,
 p_addparam like sxpgcolist-parameters,
 rep_date like sy-datum,
 t_date like SXPGCOLIST-PARAMETERS.
rep_date = sy-datum - 1.
t_date = rep_date.
*p_addparam = '/sap_production/usr/sap/trans/data/zabapftp.sh'.
refresh t_btcxpm. clear t_btcxpm.
call function 'SXPG_CALL_SYSTEM'
 EXPORTING
 commandname = 'ZABAPFTP'
 additional_parameters = t_date
 TABLES
 exec_protocol = t_btcxpm
 EXCEPTIONS
 no_permission = 1
 command_not_found = 2
 parameters_too_long = 3
 security_risk = 4
 wrong_check_call_interface = 5
 program_start_error = 6
 program_termination_error = 7
 x_error = 8
 parameter_expected = 9
 too_many_parameters = 10
 illegal_command = 11
 others = 12.
if sy-subrc ne 0.
 write:/ 'Error in ZABAPFTP ', sy-subrc.
endif.
regards
vinod

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