H3 will not update DP8K

I´m having problems when using H3 to do software updates to DP8K.

H3 simply wont send updates to DP8K. Console sees the DP ok and suggests update but DP wont start updating.
3 button forcing has been tried.
Direct connection with crosscable has been tried.
H3 just will not update the DP no matter what.

But when the same DP is connected to our fullboar updates go nicely in.

So this suggests that theres something wrong with our H3.

Weird thing is that same H3 and same DP8K work ok in normal use.

This is not a new proglem to our H3.
Problem occured when updating allready some time ago at least from 3.1.8 to 3.1.9 and now recently from 3.1.9 to 3.2.1.

The H3 is dated to Nov 5, 2004, serial 61CA4504002.
Connected during update attempts: Miniwing, 2 monitors, mouse+keyboard.

Any ideas why this is happening?
Can something be done about it?
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