DNS A record help

[#1]

I have a friend who's static HTML website is currently hosted on PlusNet.
He wants a new website written in Wordpress, and his current PN hosting cannot support it - I have unlimited webspace/add-ons with Dataflame and I wish to use this for his domain.
I've set up the add-on at the dataflame end, and changed the A record at his end, but nothing appears to have changed.
I'm tried using the A record settings as :
home A <ip address of my Dataflame host>
and
<domain name> A <ip address of my Dataflame host>
Am I doing something wrong? I've used add-ons before on my DF account without any problems.
TIA
Adam 

[#2]

It just sounds like the A record might be wrong.
As DNS records are set up on a domain by domain basis you don't need to specify the domain name itself in the left filed (which is what it looks like you've done) instead you'd need to specify a prefix for the redirect such as www (no dots needed on our system).
Here's a page that explains it quite well: http://usertools.plus.net/tutorials/id/14
Let me know if you still need help after that as I can have a look for you.
Adam

[#3]

you need it to be
<blank>  A  <IP address>

[#4]

Thanks for the responses - putting 'www' in the left field works for me. I hadn't fully understood what the field meant.
Adam

[#5]

Quote

I hadn't fully understood what the field meant.

That's really useful feedback and a good point. I can completely see why you might have thought that.