Samples not recognised when opening saved EXS Instrument

Question

Whenever I create a new ESX instrument and save it, it doesn't recognise the samples when I open it again. I can see the samples listed when I go into the EDIT screen. I can see them all mapped to individual keys. But the instrument just plays the default EXS tones. It works fine the first time when I initally load the samples. The problem occurs when I save and then reopen.
I am no stranger to the EXS, I've been creating instruments for years. But this has started happening recently (possibly after an interim update of Logic, I am not sure).
Some more information
1. If I hover the cursor over one of the WAV samples in the edit screen, it shows me the location of the sample. I've checked and the path is correct.
2. In the "zone" tab, I've tried using the "update selected zone info from audio file". It doesn't work.
3. I've tried clicking on the individual samples and using the "load audio sample" and it does not work. It still plays the default EXS tone
4. Creating the EXS from scratch and then saving it in the project, by ticking the "copy EXS instruments to project folder" and "Copy EXS samples to project folder" doesn't work either
5. I've tried doing Repair Disk Permissions.
6. I've tried re-indexing Spotlight
And here's how I create my EXS instrument. I'm using it to create a soundbank of kicks, snares etc
1. Click on EDIT in the main EXS screen
2. Click Zone -> Load Multiple Samples
3. Select the samples I want
4. On the next screen, take the "Contiguous Zones" option
5. At this point, I can use the instrument fine.
6. Click Instrument -> Save As, and save to an EXS folder I've set up
Any help greatly appreciated.
Here's my specs.
Logic 9.1.3
Leopard OSX 10.6.6
Model Identifier: iMac
Processor Name: Intel Core 2 Duo

Answer 1

You can save anywhere you want.
I have alot of EXS Instruments from ZeroG, but the problem is it takes time to load because it has to find the samples once you move them from the user library path.
Once loaded I save to update the sample path.
Of course, if you have hundreds of EXS Instruments, that's just a waste of time.
That's why I bought this
http://www.redmatica.com/Redmatica/ExsManager.html
So easy to use and the EXS Instruments load instantly because the ExsManager program updated the sample path.