devn-ppc8250 problem

hello all
Iam using the devn-ppc8250 driver for PowerPCQUIC , and it is used
the SCC in ethernet mode. I am having problems with FTP to the

some of the device they work just fine , some of them the FTP hangs
out after transfering few kilobytes and the give me this error

Netout:connection reset by peer ,

but the other problem is that I discovered that the whole QNX image
on the flash carshes , which any process was running at that moment
is gone.
and nothing solves the problem other than restarting the board.

if anybody can help with this problem please post your ideas