Hi Daryl,
I’m sorry your Control Panel has become unresponsive! The change in FTP credentials should have no impact on this.
Under most circumstances, I would recommend you refresh /themes as a first step. You are running such an old version of ExpressionEngine, that won’t be an option.
What is the “Coffeebreak Template”? Is that a site template, or a Control Panel theme?
Aside from the new FTP info, did you install any new add-ons at all?
Running such an out-of-date version is really going to limit our ability to help. Even with the Control Panel misbehaving, you can still update to ExpressionEngine 2.4, and I strongly recommend you do. There have been numerous bug fixes, security updates and features in the 2 years since your version was current.
I’m still going to do everything I can to get you back up to speed!
Cheers,