Do you mean to say that Import window does not show any images to be imported?
What is the source of import? Hard drive or a card?
Could you please share a screenshot of the import window?
Also, please update to version 6.5 : Keeping Lightroom Up-to-Date
Thanks for the update.
Go to copy option at the top and expand destination panel > then, go back to Add panel and check if the images show up.
Thanks for helping.
If I am changing from add to copy in the destination panel, I can see the pictures.
If I am changing back to add instad of copy, the pictures are not there anymore.
Correction: Now the pictures stay in the window, when I am changing back to add instad of copy.
Thank you very much for helping.
Glad to know you got it sorted!