MLT anonymous cvs was not updated with latest development, including the
latest kdenlive module.
With developer CVS account, you can check in/out mlt code without any
problem. On the converse, if you checkout with a an anonymous account,
you can only download the code from 3 weeks ago.
cvs -z3 -d:pserver:anonymous@...:/cvsroot/mlt login
cvs -z3 -d:pserver:anonymous@...:/cvsroot/mlt co -P
Look into src/modules there is no kdenlive directory.
Could you migrate to SVN please? This could be THE solution as
SourceForge CVS is not working well and this is known issue.