Unable to set Text in rundll32 window

Hello, 

I have a problem trying to write into a popup window; its fullname is something like this:

 

Sys.Process("rundll32", 2).Window("#32770", "Connect to %s", 1).Window("ComboBoxEx32", "", 1).Window("ComboBox", "", 1).Window("Edit", "", 1)

 

Its a popup window to connect to a proxy server that requires authentication.

I can use setFocus() or clickR() methods, or even wText to return the value of the combobox (if I set the value manually),  but setText or Keys() methods don't do anything. I tried running TestComplete as administrator; the same with the process that tries to make the connection and nothing. Any ideas?

 

I attach an screenshot where you can see the popup window