HH IC110-S Amp Help

[Ampla123]

Bought a HH IC110-S amp (http://www.hhamplification.co.uk/ampcompic.asp?bigpics=dbfiles/amps/ics.jpg) today but cant seem to get it running. I'm pretty sure that its workin cause when i turn the switch on it lights up so i there is definately power. But when i get it plugged with my Stagg CA-15 (http://www.ariettamusic.co.uk/staggCA15amp.html)and then through to my guitar, it doesnt seem to have any effect on the guitars sound. Now i dont no a thing about amps for this is only my first so thats why i'm on here so that hopefully someone can telll me where i'm going wrong. It may be that this is not how you use the amp atall and i'm doing it all wrong. Its not anything to do with the leads i dont think because they work perfectly when the guitar is connected directly to the Stag CA-15. So i'm not sure that what the problem is. It could be that the stagg amp isnt supposed to be used and i need a proper speaker or it could be a matter of different things. So if anyone no's how i can get my HH IC110-S up and running please leave me a comment, cheers.