Problem with unwraping in Blender 2.5

Hello, I’m totally new at this forum and this is my first post…

I have a strange problem, I’m working with Blender 2.58b and preparing model of fish. I have finished modeling and want to texture it. I mark all seams I need, select every faces and click unwrap…, but nothing has appeared in UV/Image Editor. I append my model to Blender 2.49 and without any changes it works perfectly, so I go back to 2.58 and try to unwrap a cube and it worked. Do you have any idea why is it like this? In the end I can do it in 2.49, but I would like to get along with new interface…

I vaguely remember having a similar problem with one of the 2.5 versions. I just wish I could remember the solution. Did you unwrap to an image texture, or just a blank UV editor? Did you try using the U key to get to the unwrap menu? Did you have a UV window open when you unwrapped?

I am new to Blender but think I have had the same problem. Before you unwrap, select all of the faces and I think your UVs will appear.

I did everything except using image, now it works. Very thanks for a clue.