OK, I read again the COLLADA spec and found the exported file is missing the animation clips, I made a few tests adding this tag but when animation clip is missing start and end attributes the importer assigns 0.0 and 1.0 respectively. These attributes are optional and end should be the last time of the longest animation.I'll modify the exporter to include these tags and validate if it's possible to add -loop sufix when suitable.I attached the model with only two animations (idle has time fixed and run doesn't).