The pictures i imported are not visible ?

Hello,

I am quite new and so called "noob" when it comes to CorelDraw X7.
My Supervisor asked me to make some Posters for the Company and i am currently working on it.
First of all, what i am doing might be completely wrong so if u guys have any suggestions i would be happy to hear them [:D]

I had to import couple of Powerpoint slides(Graphics/Charts) as images to Coreldraw the first problem copy/paste doesnt work. So i tried to save the slides as Windows Enhanced Metafile and then crop them. It kinda worked i had to write everything again in CorelDraw cause otherwise the Letters were either too small or too big comparing to other letters i wrote in Coreldraw.
It takes long though.

Anyway after i was done i saved the file and closed it. Today i started the Software again to work but the images i imported are gone. if i click where the image was i can select it and if i click twice then even i can see the image in Microsoft Paint. But I cant see them in Coreldraw.

So obviously my question is: How can i bring those images back?
I am uploading screenshot so u guys can see what i am talking about.

Many thanks in advance