Software Deployment

hello,

i am trying to install this SAP patch silently via SMS but so far i had no success.
i tried runing the
%ProgramFilesDir%\SAPPC\NetInst\SAPSETUP.EXE" /Patch:"%PathToPatch%\SEM31A.EXE" command with no success (there is no %ProgramFilesDir%\SAPPC\NetInst on the local system, so i did the SAPSETUP.exe from setup directory on the cd...)
also, there is no SEM31A.EXE...

so i tried SAPSETUP.EXE" /Patch:"%PathToPatch% /silent...

sap setup start in task manager and dissapear after 5 second... nothing is installed...

anyone wouold know some more command switch i could use for SAP patch instalation?

many thank's

[:)]