EXS 24 Logic Sampler Users Group

Dear guys,

I just had a horrible recording session!
A client came with a LAMP 4.6.1 song, recorded at his homestudio to 
have it well mixed.
Starting the song with my LAMP 4.7.3, I had not one of his exs' 
instruments showing up, nor could I find them in the exs cockpit, 
though I had them on my Logic partition!
Then I started his song with an old version 4.6.1 I had kept on my drive.
Not one of my kits for exs available!
Figured out that all my Akai converted sets had to be reimported in 4.6.1.
The format of the import is different! In 4.7.3 a drum set is 
splitted up in several drumgroups, in 4.6.1 the same but there is one 
exs instrument playing all drum sounds!
Then, it's not yet finished, the song was mixed, and closing the 
Logic songfile, it asked me to save the changes to the 
druminstrument, and as I said yes, Logic told me it wasn't possible! 
(Wrong path, wrong drive aso.) Reopening the song afterwards, the 
instrument wasn't there anymore!