dreambox 500s missing channels HELPP PLEASE!!!

[nuri85]

hello everyone!!
please help me!!
i have 2 reciver both dm500s
one of them missing channels, i was editing channels remove some bad channels and when i save it after this some channels not working (before this editing work fine), when i use my another reciver same channels working fine but in this one not working, i try flash imagine but no its not working, i send by ftp those channels witch not working still not working, but when i choose someone of this channels witch normaly not working and go to search manual and exit back channel works but when i change it to another channels and come back to first channels not working, pleaseee helpp what i should do, its missing alot channels, with my another reciver my all channels works but with this one i have this big problem!!! pleaseeeeeee helllllppppp!!!!
i have good signal and i dont missing from transpother edit, please helllpp