I have been trying streaming from 5620
streaming works well from 7000 but not from 5620

pli iolite latest on both my 5620 and my 7000
yes zapstream enabled in both
both on same 100 base switch
stream to same pc
so only difference is box hardware

ftp from and to 7000 clocks over 1500 kb/s in wsftp
ftp to 5620 clocks 1400 kb/s
ftp from 5620 is lucky to clock 200 kb/s
so is there any known issues with network on 5620 ?
any other ideas on where I go from here
can't stream - cant record - at least it decodes ok ..