RubyMine 3.0 RC and redmine tasks

Hi there,

When I try to add my redmine in tasks servers, I get the following error : "sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target".
This happens when trying with https. With http instead I get this : "Error on line 1: White spaces are required between publicId and systemId".

Any help would be appreciated,
Thanks :)