No surround sound with dolby

Hi,
I have an Aiwa z9400 stack system, it got to be about 7 years old now and was handed down by my dad. I never had the original speakers for but puchaced some rather basic Accustic Solution one so I could make use of the Dolby 5.1.

Since own it I have neve managed to get any noise to come ouit of the speakers. On the back of the reciever I 4 phono sized plug for centre, 2 x surround and a sub. I have purchased phono style connectors to slot into these and wired them to the speakers (I presume that this is correct).

There is a test tone option on the reciever to set up the volume levels on each speaker, I have tried this with no luck.

Is it going to be a shop job or am I just being blonde?

Thanks in advance