Ok,disappear but still turn on or not?
Do you still original e1 firmware or have flashed(upgrade)?
If you are still original,i suggest you to flashed with MP you want,you can download at e398mod.com and choose monster pack section.
Coz sometimes,an original firmwares is adopted some bugs that can happen to us in many things with different problems.
Read this for flashing:
http://www.e398mod.com/content/view/10/25/Coz simetimes original firmware get crashed and bugging your phone,so i think that your problem is about it.
So flash and flash.