In that case, if the kn2000 was 32 bit it may be the wrong format to convert to. If you can convert to kn1000 format you can use the style converter disk to load into the 6000, so this does not sound cut and dried to me. I have been told on several occasions in the past by various people that this was not possible when I had been happily doing it for years...
To repeat everything again, the key is whether the file formats have the information in the correct places to be able to fool the 6000 that they are a format that either it can load or, for instance EMC can load and convert, as I described above. If the ea5 composers do not have a similar structure to the 2000 composers, then 2000 is the wrong identifier to use.