I had a lot of trouble using oscam with the hdmu image in the end used mgcamd, edit mg_cfg so that G:{ 01 } looks like this for newcam client also set the attributes to 755 for mg_cfg then edit your newcamd.list you keep these two lines then your line.
CWS_KEEPALIVE = 300
CWS_INCOMING_PORT = 21000
CWS = yourline.ip port user pass 01 02 03 04 05 06 07 08 09 10 11 12 13 14 lan
depending on your setup use lan
If lan causes problem try newcs.
The odd thing is when I changed my image to pkt hyperion oscam worked without any problems.