Many animation including some of Corpro's are now using the Mpeg-2 format which isn't currently supported by Windows Media Player or many other media players. To allow Windows Media Player to play Mpeg-2 Animations you can download and install ELECARD MPEG 2 Video Decoder Package release 2.0 by Moonlight Cordless Corporation. Alternatively you can download and install  Elecard MPEG 2 Player v 2.1 by Moonlight Cordless Corporation.