SessionId null in Selenium RC test after redirect

I'm testing an app, and after I've filled an extarnal payment service iframe I'm redirected to a payment confirmation screen inside the app I'm testing.

In selenium webdriver this confirmation windows is caught and al开发者_JAVA百科l is fine, instead in Selenium RC there's an unexpected behaviour that trigger the confirmation page to be opened in a new browser window and every further Selenium command on this gives a SessionId null exception.

How can i pass the sessionid to the new window or solve the problem in some way.. eg. select that window etc.

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fist select the window using window id and den do your activities on det window. I thin this may help.

wait_for_pop_up(locator, "300000")
select_window(locator)
window_focus()
select_window(null)