Hello.
I was searching for that problem, but found nothing.
I've installed PhpED (version 4.6) and and copyied dll for debugger (my php version is 4.4.0), so debug sessions are working correctly.
But when I try to check variable value in "immediate" window it writes to me such string: "Error Debugger is not in UI state".
When I put mouse cursor over variable it writes "(undefined)".
But in "locals" window there's all fine, values are displaying properly.
What's the problem could it be?

what version/build number are shown in Help->About?

Same problem here

PHPEd v.4.6.4616
PHP DBG Listener v3.1.1

I'm unable to debug using Immediate and Watch windows

Example:

I write:

$my_var
: Error Debugger is not in UI state.

Any idea?

If you're a customer, please make sure your mail server accepts our mails and you got notifications regarding all PhpED updates.
If you're an evaluator, please stop using 4616 as it has been expired many weeks ago.