TBS 5980 dvblink synology problem

[tomco24]

Hello

I have problem with my dvblink on my synology nas DS212

I install dvblink on my nas with DSM 4.3.
Dvblink find my TBS 5980 tuner and i tune channels
Everything was working fine i pla FTA channels they are ok
When i want to play encrypted channels first time they play very well (i have skylink irdeto card) but later i tried to play same which was playing good i only have some black screen no sound but when i try record channel i have large file size but black screen.
I restart the nas and encrypted channel was working fine later i have black screen and this process is still repeating.
When i plug the tuner to my pc and TBSViewer every channel is working fine. So i think there is some unspecified problem
i think problem is in driver file
So my question is how can i install a driver on synology nas ?

Thank you
Sorry for my english