Whenever a circuit isn't behaving as expected, it pays to go through these steps systematically. This also applies when you simulate circuits and the results aren't as expected.
Verify that the power supplies and signal sources are on, and are correctly connected to the board.
Measure the power supplies and bias points, at the component pins. You may have “wired up” the circuit with loose wires or altogether incorrectly. This is where the schematic with expected bias and signal levels will be a great help
Bias points: Check these with a multimeter. Note that the multimeter's input resistance of 10MΩ, while much larger than the impedance of most circuits you will be dealing with, can disturb the bias of high impedance circuits.
supply levels
opamp inputs should be virtual shorts
opamp outputs should be well within swing limits for the given supplies
transistors' base-emitter drop should be about 0.65 V
transistors must be in their active regions(CB reverse biased)
Signal levels: You need to check these with an oscilloscope. An oscilloscope's input impedance (approx 1MΩ in parallel with 100pF) can disturb high frequency circuits. So use 10x mode where necessary. Generally many circuits we use are excited with periodic inputs and it is convenient to check the signals progressively through the circuit, starting from the input.
Measuring “AC” voltages with the multimeter: The digital voltmeter typically measures the average value of the rectified input and gives you readings in rms Volts assuming that the input is a sine wave. The readings will be horribly off if the input is not a sine wave. Also, the frequency response of the multimeter is only upto about 500Hz. So do not use the multimeter to measure ac signals unless you are absolutely sure of what you are doing.