Hello fsharpminor....and everyone else who responded - I'm being a bit lazy and trying to save myself some typing (energy saved to be used on organ practice..!) - thank you for your quick reply - I didn't expect to receive so many, so soon (and thank you for the welcome too!).
The piece I've had most success with so far is in Anne Marsden Thomas' book two, 'Zu Bethlehem Geboren' - because there are only two notes with the pedals - G in the left foot, D in the right foot - even I can manage that, and also put both hands with it! I did start off with some hymn tunes, but I was so intent on trying to hold on to notes that you can release on the piano (thanks to the tre corde pedal....)....that was enough for starters. I have tried all combinations - I suppose I have to remind myself that I'm very much a 'sprog' at organ playing yet. Yes, I am taking lessons - at the Church of the Epiphany in Washington DC, across the street from my office. (I come from Lancashire, England, but have lived here for 30 years...) My teacher thinks I'm doing really well, given my very limited practice time; he's really very encouraging. He even managed to acquire a used pedalboard for me which is sitting in the garage at home, awaiting a bench wide enough to go over it....then I might try positioning it as close to the piano as I can and see what happens!
Like SueHM I'm a fairly competent pianist with some advanced rep., but reduced to an uncoordinated wreck at the organ! I'm SO glad to know I'm not alone in the world - everyone's words have given me some fresh hope.
Must tell you of one incident...I was really floundering around one day during my practice...noticed a very well-dressed African American lady sitting in the church....she suddenly appeared at my side, handed me an envelope and said "this is for you". A TIP, I thought? Never...!! She said how much she enjoyed the music (REALLY??....) I was trying to get to grips with Mendelssohn's 3rd Organ Sonata (slow movement) and not doing too well....feet, of course...and said some nice things to me. She asked my name, so I told her. Anne. When she left I opened the envelope; inside was a 'Thank You' card on which she'd written:
"Dear Anne, Thank you for your melodic ministry. Your sounds are soothing to the heart and soul. In sincerity, Sandra Hicks."
Then she was gone - she'd never been inside that church before, and I haven't seen her there since then. Now I'm really pinching myself - if it wasn't for the fact that the card is right beside me I'd think I'd dreamt it.
Thank you again for the warm welcome - to anyone else experiencing my problems, let's stay in touch!

(no organ emoticons, unfortunately!!)
QUOTE(fsharpminor @ Oct 9 2008, 07:50 PM)

Hello lilorganannie

, and welcome to the forums. You will get plenty of advice here.
Have you tried an easy piece just using right hand and pedals together ? Then when you've done that try just the left hand and pedals togther. Then finally all three .
I know this seems the obvious answer. Most new organists find the main problem is co-ordinating the left hand and pedals, particularly when one is travelling up and the other down. Are you actually having organ lessons, or just trying to work it out yourself from your piano playing ?
Suggest you also try to play some of the easier hymns (eg tunes Ravenscroft and Caswell), using pedal for bass line, left hand for tenor line qad ignoring the right hand to start with. The later add the right hand. You will soon get the hang of it !
Hope this helps. Good luck , and welcome to the wonderful world of pipe organs !