Hi Dong Zhu,
Could you please post the script in totum so that we can see how it is working? There are a few different ways to invoke the /okdc transactions so it would be nice to see what is working for you. I believe I saw a similar post from you for a script to launch iw21, so that solution should be the same here?
I'm facing the same issue, with the additional problem that the built-in Transaction buttons do not seem to be working either.
Thanks,
Francisco