Exporting from Maya 2011 COLLADAexporter

Hi, I´m trying to export a maya 2011 animation. I did it sometimes before with this model, but now I add some extra geometry,bones and more animation frames. Now at the moment of viewing it in the iPad it appears just in white and any error message. I use iPad2, a 3639 poly scn, 180 animation frames and 92 bones structure. Is there any limitation about bones or animation frames?

Thanks in advance!