1) - Have you installed previously v3.0.0. ( If so, uninstall EMC --> Addons Uninstall ) and reboot your box!
2) - Install EMC 3.7.4 beta ( restart enigma2 ) --> after that go to Setup / Plugins, and config EMC.
3) - After that you can acess EMC ( By LONG PRESS BLUE BOTTOM )
Note:
4) - If you have not maded the config setup of the plugin on -> Setup -> Plugins --> You must do that!
If this version don´t work, you can test other that give you
subsupport to subtitles ( download and install from here ):
Install Python -->
http://www.vuplus-community.net/board/threads/external-player-in-xbmc.21286/#post-166067 ( only )
Install EMC and Subsupport -->
http://www.vuplus-community.net/board/threads/external-player-in-xbmc.21286/page-2#post-166897
Note (2): You must config EMC and make your SETTINGS on Subsupport plugin.
best regards
nunigaia