Can you post your conf file and sever file (edit out the details of your pass etc) I made the move from mgcamd to oscam as mgcamd did not auto switch to the fastest line.
Best thing I did, I did have a really good line in mgcamd but got the odd glitch I bought a cheap line off eBay and added that(they gave me a test it was fine). It switches automatically now and spends most of its time on the line that was less than £6 it's really stable now.
I have heard some providers don't support the use of oscam so that might be your problem, or do you still have mgcamd connected/running at the same time (the sever might think it's two connections)