Sharing post from archive page (loop) doesn't work

On my archive page, I have for each post( I have include in the loop) the possibiity to share the post via facebook via this code:

<a href="http://www.facebook.com/sharer.php?u=<?php the_permalink();?>&t=<?php the_title(); ?>" target="blank">
<img width="50" heigh="50" src="http://img.mywordpresstips.com/posts/fb1.png" alt="Facebook" /></a>

However, on click it allow me to share only the current page – and not the post . . .

Do you have any idea how can i fix this ?

Thank you for your time 🙂

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