managing dns records

[#1]

I would like mydomainname.me.uk to point to my own server.  I am pretty sure it used to (may be years ago).
If I put my fixed IP number in firefox I get my server, if I put in www.mydomainname.me.uk I get a 404
and if I put in mydomainname.me.uk it I get cannot find server.
So what do I put in Left field Type Pri and Right Field ?
I assume I do not need CNAME record.
Also if I ssh or git or whatever other service I use and set up in the router can I use mydomainname.me.uk ?
I am using the proper domain name by the way.

Your help pages should give examples.
Billy

[#2]

The help page is poor on this but the tutorial http://usertools.plus.net/tutorials/id/14 is good.  If any plus net staff see this can you link to the tutorial on the help page.
I guessed correctly but did not wait long enough.
billium