No any result when run the script

[Hui Du]

Hello,
I have the following simple script:
'define
t20=aave(ave(t2,t=613,t=736),lon=230.505,lon=252.651,lat=28.4976,lat=46.6943)'

'd t20'
by the way, I have opened my data, when I run this script, there was no
any output However, when I type them in the command prompt, I could get
the result.
**************************************************************************
ga-> define
t20=aave(ave(t2,t=613,t=736),lon=230.505,lon=252.651,lat=28.4976,lat=46.6943)

Averaging. dim = 3, start = 613, end = 736
Define memory allocation size = 4 bytes
Name already DEFINEd: t20. Will be deleted and replaced.
ga-> d t20
Result value = 279.774
***********************************************************************
Has anybody had this kind of problem?
Any help will be appreciated.
Thanks a lot
Hui