simulink and the active X gauges for power measurement

Hi. I have basic circuit comprising of the 220 v supply and a 25 ohm resisor. I have connected the normal ammeter in series and have also put in a voltmeter across the supply. I then put a block called product.the reason being that I want my gauge(from active X) to measure power.So I connected the part of the ammeter on the top of the block which can also go/connect to scopes. So I took the ammeters side to the one side of the product side and then the voltmeters side to the other side of the product. My active X gauge which is an ammeter which is provided on the gauges blocksets ON SIMULINK. Cany one please assist me as the gauge does not move up or down, or with relevant information with recpect to simulink and making the gauges/blocksets work correctly. any questions or critisms or any possible solutions will be well appreciated. thank you