I am attempting to add a My Account page to my site and am running into the error

The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases.

I am just loading MyAccount.ascx as a control, and then calling it in my content area but this does not seem to be the correct way to use this. This is the first time I have attempted to have a secured section of a site with Kentico, so I am a little unsure how to use this. Thanks in advance.

Chris