Edge no unwrapping

I’m trying to unwrap a model but some of the edges are not unwrapping even though i have marked them as seams

Hi Chuk_Chuk,
Check you have removed any doubles (W / remove doubles). If that doesn’t help can you attach your blend file


After closer inspection of the uv it turned out it was being unwrapped but it was so close the edge next to it, they looked like one. Sorry