Hey Kathryn,
I switched providers (was using my sister’s hosting) and it’s all working perfectly. It’s a great theme as I expected and I look forward to digging into the CSS!
In case it makes any difference, the hosting I’m with is Linux based as opposed to MS ISS. I’m sure the problem lay elsewhere, but just to have it said in case anyone else is having a similar problem and is on Microsoft based hosting.
Thanks for your help.