Suppose life, hell, even an advanced civilization exists on a planet orbiting that star. They may be more advanced than we are, about as advanced as we are, or less advanced (to state the obvious).

If they're less advanced by even 100 years or so, they may not have even invented radio communications. If that's the case, we can't hear them and they can't hear us.

If they're as advanced as we are, they might be able to pick up our radio/TV tranmissions, at least to the point of knowing the emissions aren't natural. Let's see, 45 years ago was 1959. How advanced were our radio observatories back then? Even if they did pick up the signals and replied, it could be years before we hear their response. Like us, they could be many years from being able to develop a system to travel 45 lightyears. In astronomical terms, 45 LY is next door. In today's aerospace engineering terms, it's thousands of years of travel time away. After all, 45 LY is about 426,027,600,000,000 kilometers. Even if you could average about 100,000 MPH (~160,000 KPH, about as fast as any manmade spacecraft has ever achieved), it'd take over 300,000 years to cover the distance. That's a long time in human terms.

If they're more advanced than us, then they may no longer be using high-powered radio transmissions (we're gradually getting away from them ourselves), so it'd be hard for us to detect them. They may still lack the technology to travel such distances.

Based on the evolution of RF technology and the only history we know about, there may be a window of opportunity for detecting radio signals. It might be only 100-200 years wide. If so, then that might be one reason why SETI hasn't detected anything.