Master page/content page postback problem

[timmym]

Hi,

I have the following scenario:

I am using a masterpage (masterpage.master) which contains a textbox and two Imagebuttons as server controls. I tried some non-input content pages using this master page and everything is OK.
However, I have recently added a new content page which consists of an <asp:Wizard> and its steps, one of which contains <asp:textbox>es and some validation controls. The problem I am encountering, is: if the initial value of the textbox(es) is, say "abc" (set in <asp:WizardStep> html), even if I type this value to say, "hello" (when running) and put a breakpoint in the content page's Page_load to see the value after postback, it is still given as "abc" (even though I have typed "hello" in the textbox(es)).
I also noticed incidentally that if I remove 'EnableEventValidation="false"' from the masterpage, I get "Invalid postback or callback argument" error.
What I do not understand is that if I remove the master page (or use a different page with the content pasted in and no masterpage included) the change is registered after postback.

Could anyone please help?
Thanks in advance,
Timothy

[timmym]

OK! Solved the problem...it was that the master page had a <form runat="server"> and a redundant <form> (without the runat="server"; which came from the template I used) deeper down, which when removed, made everything work correctly!