Michelia champaca - Yellow Variety - Need help please

I didn't want to post this on Jungleman's thread, but I need some advice. My Yellow Champaca is not doing so well. It has lost all its leaves and starting to die, just wondering if there is anything I can do to save it. I stopped watering it, incase I was overwatering it. (The picture shows it wet because it just rained today) however it has been on the dryer side and just watered lightly.

I purchased it from Top Tropicals about 1 1/2 years ago and it was doing beautifully in my lanai full of leaves, I decided to move it outside under my oak tree to get some more fresh air, I also repotted it up one size at that time also. From then on it started dropping all it's leaves. Not sure if it got over watered from all the rain we had over the summer or what I did wrong. My white Michelia is doing ok.

Any ideas? Advice?
Thanks in Advance

It's hard to see since I have so many plants in the background but here's some photos.

Here's a closeup of the tip which is dying off.

Here is one of the branches, it is starting to get a brown tinge to it.

Here is the base of the plant (it is only so wet because it just rained today)

Astcgirl, I have lost several seedlings as well. I presently suspect this is a moisture related issue. I've had excessive rain at times this year and that is always when mine looked worse. I tend to keep the moisture fussy trees in mind and stick them on the sunny side of the porch when I know rain is coming.

I wonder if it was maybe planted a little too deep in that pot? Usually you start to see the bottom of the trunk flare out a little bit as the roots start and that part where it starts to flare out is supposed to be above the soil, but that doesn't appear to be the case here.

Interesting point ecrance3, I may remove a little soil today and see, I'll also bring it back into the lanai (it's raining again) to keep it on the dryer side. I don't really want to take it out of the pot since I had heard that Michelia's are a little fussy with being disturbed.

F4F what other trees do you have that are moisture fussy, we like so many of the same fragrant ones, I'm probably missing something and wondering why they are not doing so well. I'm still learning so much about which plant likes what type of conditions.

Thanks for your input.

Took about 1" off soil from around the trunk, down to where the "real" base was....you may have been right ecrane....it doesn't really flare out but it was about 1" deep before I found the roots flaring out. I removed the soil, took it inside the lanai and have my fingers crossed.
Thank you everyone.

One of the other fussy seedlings I've been trying not to kill is Dais continifolia. I'm not entirely sure that the rain is the only factor (I think it may also be a pH problem, but there is very little agronomic information that I have been able to find about this species.) I also let my Nicotiana seedlings get too wet and lost several of those.

Just when I think I'm getting the hang of gardening I loose one.....sadly my Michelia champaca died. Luckily my alba gave me a flower this year and my Ylang Ylang has two buds on it currently, so I guess you win some you loose some.

F4F the Dais continifolia sounds interesting, it looks gorgeous, is there any fragrance? not sure where you would find more information on it, I looked and found http://www.plantzafrica.com/plantcd/daiscotonifolia.htm but it was spelled Dais Cotinifolia incase that helps any.

Actually it is similiar to Edgeworthia papyrifera (they are in the same family as the Dais Cotinifolia (Thymelaeaceae) which I tried growing but also lost (either to wet or ph as you mention) it was very fussy. It was quite a big plant also that I purchased and looked healthy but it went downhill from there. It is supposed to be fragrant and looks gorgeous. Let me know how you go with your plant.

Looking in the plant files (Thymelaeaceae family) Daphne is also in that family....I'm hopeless at daphne's I killed one of those last year also. I think I'm leaning towards wetness being a major factor as that is surely what killed my daphne, I had it in a bad draining soil, it was rotten when I figured it out.