Flash Builder 4.5 can't find Flash imports

Question

Hi everyone,
Not sure if this question has been answered elsewhere in the forum but I'm using Flash Pro CS5.5 together with Flash Builder 4.5 which are supposed to integrate well (I'm led to believe anyway).
After importing my Flash Pro project and opening up my class files in Flash Builder 4.5 I note that all the Flash namespaces/imports can't be found. I'm at a loss as to why this as the import process seems to be a straighforward process.
Am using the Flex 4.5 SDK.
Anyone else get this and, if so, did anyone manage to resolve it?
Any pointers would be much appreciated.
Sincere thanks.
Jas

Answer 1

Oh, and I forgot to mention that I get the same stupid error for this code which worked perfectly in FB3:
for (var key: Object in Event_MouseDown_Callbacks) (key as Function)(sender == null ? this : sender, flashEvent, Event_MouseDown_Callbacks[key]);
I get the error for (key as Function). This code is within a Function of mine.
As for my original post, I just re-tested that issue in FB3 and there, when I hit . (dot) after the cast, it CORRECTLY LISTS all the members of the G3Widget Class.
I've looked in the options of Flash Builder 4.5 for an hour trying to see why it behaves like it does. No luck. And it's probably not an option. It's just that, by default, it doesn't list the members of the type after you cast it, which, in my opinion, is a HORRIBLE mistake. I'm going back to FB 3.