Everest

I'm building a bike with a set of tubular rims that came on it and have some questions. It came with 2 Vittoria Nuovo Pros and a Wolber. The rear Vittoria dosent hold air and apparently was ot glued to the rim. Is there a way to fix it? I tried to put the wolber on thhis rim but it just wouldnt fit any tips? Also the front holds air but after the rear wasnt glued on I checked and made sure this one is glued on but the glue is kind of tacky and not real secure. I imagine I will have to reglue this one as well. Is there anything wrong with reuseing these tires there not in the best shape but seem allright? Thanks for any and all help you can offer.