launcher run line problem

[Todd And Margo Chester]

Hi All,

Scientific Linux 6.2, 64 bit
Xfce 4.8

This run line won't work in my launcher, but if I copy
it to an xterm it does work.  What am I doing wrong?

rdesktop -N -d FooDomain -u todd  -g 80%% -a 16 -r printer:B4350='HP 
LaserJet IIP' -r disk:MyLocalDrive=/home/temp -r clipboard:CLIPBOARD 
vvv.xxx.yyy.zzz

Many thanks,
-T