Checkboxes not being Checked

Hi,

I am encountering an issue where there are several checkboxes that need to be checked and saved.  I see that the boxes are checked on the frontend, however they're not being reflected in the backend.  I have tried the following methods and they all failed:

1. recording the click with "simulate real clicks" AND "invoked onclick" set to true
2. using a coded step with the following code:

ActiveBrowser.NavigateTo("http://........);

HtmlInputCheckBox CheckAnimated = Find.ById<HtmlInputCheckBox>("is-animated-ad");
CheckAnimated.Check(true, true);

HtmlInputCheckBox CheckExpanding = Find.ById<HtmlInputCheckBox>("is-expanding-ad");
CheckExpanding.Check(true, true);

HtmlInputCheckBox CheckTaskbar = Find.ById<HtmlInputCheckBox>("is-taskbar-ad");
CheckTaskbar.Check(true, true);

HtmlInputCheckBox CheckPopover = Find.ById<HtmlInputCheckBox>("is-popover-ad");
CheckPopover.Check(true, true);

both method failed, I would appreciate it if you can provide me a better solution to this problem. 

thanks,
Dan