Why won't my wifi booster work?

We have wireless internet in our house and it doesn't reach all the rooms. Recently we bought a wifi booster in order to improve our wifi range, however it won't work. After screwing the aerial directly into the router, screwing the base into the router and having the aerial stand in the centre of the... show more We have wireless internet in our house and it doesn't reach all the rooms. Recently we bought a wifi booster in order to improve our wifi range, however it won't work.

After screwing the aerial directly into the router, screwing the base into the router and having the aerial stand in the centre of the room, and screwing the aerial into one of the computers further away from the router, our wifi still remains the same.

We have a D-Link router and a D-Link wifi booster. What's going wrong?
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