You are 100% correct MxxCon!
I have installed FlashFXP 3.0 and can see that this release handles problems in a better way.
I also did beat up the admin of the server I had problems with
.
He had misconfigured his port for FTP (he used a different one than port 21).
This did solve the problem!
Thanks for your help MxxCon
One more happy FlashFXP user
Ed