DataMapper ORM v1.8.2

[eluser]Andrea Coronese[/eluser]
Hi, I've a problem with DataMapper-ORM spark version 1.8.2. It doesn't even seem to load at all. If I put the spark name in my $autoload["sparks"] array, my site crash with HTTP 500. No PHP logs at all in error log, but from CI logs it seems to stop at the CI Loader initialization, which makes me think that it is the spark messing everything up (if I remove the autoload, the CI installation works like a charm).

Please help