not booting up after mgcam disable

heyho---first post and i have a problem. have a duo clone running vuDuo 3.0.205 cloneuk I got from this site some time(1yr) ago. All has been ok until my mgcam expired and as I have a cccam available I decided to use that. did the CCcam.cfg and put in etc..... I know it all works ok when running.
Problem is that if I have to reboot box it will not boot up--just stalls on gui screen..... have tried disabling lots of things but have got down to this------if I stop mgcam running(has to be stopped to use cccam) and try to reboot box, it just stalls..even before I have done anything with cccam (then have to reflash image). have tried lots of other images but most of them will not even boot-up the box.
I appreciate this is a clone box (I didn't know it at the time and didn't use it a lot as had spiderbox on motorised system and just used the vu for astra 28deg).
Any help appreciated and its taken a lot of work to narrow down the parameters of fault---so whats in the mgcam that assists the boot-up