WebPlus X5: 1&1 access problem.

I have three domains on 1&1which I intend to start using again. I have switched to X5 as 1&1 have stopped supporting my old publishing program MS Frontpage. I have been trying to access one of the domains (www.bsgsec.co.uk). I entered this in the ftp address box and completed the account window with my 1&1 ftp account username and password. It tested ok but when I uploaded the test page I had created it appeared in one of the other domains www.tramwater.co.uk. This domain was the original one I created when I signed up to 1&1.
Can someone please tell me where I have gone wrong please SM:HELP.

Many thanks in advance.

John