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So there is a lot wrong with this circuit... so first off the left side of the circuit with the power supply needs to be grounded. Now you will see it will act like it will work then it gives you a solution cannot be determined message. That is because the power supply is dc, dc doesn't pass through a transformer, you need ac to get that to work. So change it to an ac power supply with 60 hz for the frequency and 3 volts for the amplitude. Now you have two diodes here and they are both only allowing current to pass one one, unfortunately it's the wrong way for both, so delete the bottom one and reconnect everything(you could leave it and just flip it, but that will not benefit you because it will only cause more of a voltage drop). Now adjust the capacitor to 200 microfarads(the symbol for micro looks like a wired u, it's the Greek letter mu), adjust the resistor to 50 ohms and finally put the resistor and the led in series with each other and the led will light and stay lite with a maximum current of 20 milliamps. Now it should work. Did you not check this before you posted it?