Buttons stopped working

[Duncan Welch]

I have multiple projects that I've just converted into a single solution, by
changing the namespaces then adding each project.

After a fair amount of heartache, most of the projects are working now.

Unfortunately, on one project, whenever you click a button, it redirects you
back to default.aspx. Doesn't matter which page you're on, or which button
you click - it redirects back. It's definately a redirect, as it runs the
code in !Page.IsPostback

Does anyone know a possible solution to this?

Thanks in advance,

Duncan