imToken did not support ETC, if you transfer ETC to imToken, you have two ways to solve it.
1. Go to Candy Bar(in Discover module) in APP transfer out the ETC.
2. You can click this: http://v.youku.com/v_show/id_XMjc0OTU1NzQzMg
PS: Don't use IE browser and save the keystore as '.txt' format when you export from imToken , and import in Myetherwallet.