I haven't seen any one post this particular problem before. What version of Fireworks are you using and on what operating system? If possible, can you post your document for others to look at or try their hand at?
If it isn't too big, you can insert the image with the camera icon. Attached images can sometimes take a while to move from the queue (don't know why).
I'm using Adobe Fireworks 10.0.0.495 and Adobe Photoshop 11.0 on Windows Vista.
One thing I might try doing is sending it to school and working on it from Macromedia Fireworks 8.
That fixed it, weird. Thanks anyway.