[ISSUE]Nuendo stop at opening in the ''mixer'' step

HI everyone.
i often have this issue
when i open the software, when it shows the small window whith all the parameter check (plugins etc…)
when it arrives to mixer, than it stops.
the same problem when my SSL alpha link is not powered ON (wich seems to be normal cause the madixtreme sound card is not able to synchronised)
but it happenend when all was ON and that’s a bit frustrating.
maybe another soft (mozilla open) blocked it?
if you are experimenting such thing.
thanks a lot

HP Z620 workstation E5-2620 2.00ghz 16Go RAM 64bits windows 7 intégrale sp1
soundcard SSL madixtreme SSLalpha link
enphonix MC control