thanks for your kindness and quickly response.
Yes I named and added Ajax Refresh on end, just before end icon. Now my problem is that when open in browser and I chose one of the options in comboBox 1, page don´t return, only a wite page appears. To return I have to use the navigation narrows on browser and comboBox 2 are still empty.
My problem with share eSpace only have with confidence, if we have other way insted post attach file.?.
Thanks for your help.