probs executing own binaries in procedures

Hello ! I have a problem: Executing a procudure by a trigger passing new tupel-values as parameters works well. But I´d like this procedure to make a "system"-call of an external binary. Tests like system "echo" work but system "myownapplication" in the procedure return Error 668: system command cannot be executed the application lies in the path (/usr/bin) and has execution-permissions to others, user and group 2nd: How is the syntax to pass the arguments to myownapplication wich are passed to the procedure by the trigger ? Thanx a lot, Martin