Command won't execute in launcher

[Brett I. Holcomb]

I have a command

xyz arg1 "arg2with spaces"

that works perfectly from the command line.  When I set up a launcher with 
this command and tell it to run in terminal all I get is a quick flash 
like a terminal window opened and then closed.  I've tried various 
combinations of quoting (single, double, use \ to mark the space) and 
tried exec xzy arg1 "arg2with spaces" and nothing works.  

Any ideas on how to make this work?

Thanks.


-- 
Brett I. Holcomb