problem with "repeat_on_error" command ?

Hello,
I'm trying to have an expe with failed trials taken into account, i.e., if there is a failed trial, it is immediately replayed.

So i tried the command "repeat_on_error"

for example I tried the little example of the help :

table MyTable
"condition1" 255 0 0 1 ## respond with "r" to red rectangle
"condition2" 0 255 0 2 ## respond with "g" to green rectangle

task Mytask
table MyTable
keys r g
show rectangle 0 0 10 10 @2 @3 @4
readkey @5 2000
if STATUS == WRONG
error ## this tells PsyTookit that this trial is considered an error
fi
clear -1
delay 500
save @1 STATUS RT

block MyTraining
tasklist
Mytask 2 repeat_on_error
end


But there is always only 2 trials, even if both are failed (r key for a green box for example). If I'm understanding correctly it should be played until 2 correct trials are done no ?
Am I missing something ?
Is there a problem with the "repeat_on_error" command ?

Thanks a lot for your attention and your help.
Alain