hi Andreas, i think DVBViewer don't support 5980ci now. TBSViewer is OEM version of DVBViewer for tbs,please visit: http://www.tbsdtv.com/english/Download.html download the latest TBSview-setupV20110328 just next step to next step to install is ok, after installing it,there is a TbsCIapi.dll in TBSV...