I was using a dropdwnlist with the autopostback enabled but I felt.
Now, I changed the dropdownlist with two image buttons and I have the same effect.
Fisrt I had only:
Session("LangSelected") = "en-us"
in the click event of the image button and
I had to add to the following to make it work.
Response.Redirect(Page.AppRelativeVirtualPath,
True)
Now it is working fine.
Thank you for your help.
I need some other info if you pleased.
I have some code in the content page that overrides the InitializeCulture. Is it possible to have it in a separate file in app_code and have all pages inherit the code from there?