Default LY-F1 with ICS 4.0.3 PROBLEM WITH MEMORY

hi guys ...
i have in my tablet(Ly-F1 )ICS 4.0.3 from Ly site.
I have this problems..

when i install an application from the market or usb ,and i move from tablet s memory to sd memory ,usually this app delete automatically...

but if i use app like App2sd or other ,when i go to move this app delete...and the same thing when i connect the device to pc and then i disconnect...

i use the program of system(default)...and usually i have this problem...

someone could you help me??


ps should be because i update the firmware with sd exeternal inside to slot??