Just wanted to say a big thank you to pennyworth, I was tearing my hair out until i read your post. Sorted my issues out instantly
Before making the change all i got was the power up message.
I'm using the techno-line WS2350 variant of the lacross weather station featured in the Practical Arduino book, an arduino uno v3 and v4 of the 433Mhz shield. I believe techno-line produce the version here in the uk.
One other thing on my 433Mhz shield the red and green leds don't seem to do a great deal. Not sure if something else needs changing as i now get the data feed ok. I have v4 and the green led is on all the time, the red one never comes on. When data is being received though i see an orange led from the uno itself blink away.
Hope this info helps others