how to select a file using F4 function module for application server?

Hi all,

i wanted to get the F4 help on the selection screen parameter for the file name to fetch the file from the application server. I have a file been created in the application server.

i have used following function modules:

1. F4_FILENAME_SERVER

2. RZL_READ_DIR_LOCAL

3. F4_DXFILENAME_TOPRECURSION

4. /SAPDMC/LSM_F4_SERVER_FILE

5. EPS_GET_DIRECTORY_LISTING

6. F4_DXFILENAME_4_DYNP and so on.........

i am able to get the f4 functionality but i am not able to get any value in the selection parameter when i select a particular file on the application server listing.

please help me in solving the issue.

thanks

ekta