Dynadock power management problem

I have a Dynadock which I connected with an another equiptment using the serial port.
The connection was fine at the beginning (after startup), but it is lost after that my laptop is active for a while.
Once I got loose and anchor the Dynadock, the connection is back.
I have already disabled the option of the laptop (Always ON) power management, but the problem persists.
Question: Is there in any case that I can disable the Dynadock power management feature?

PC / laptop you have?

Using XP or Vista?

Tags: Toshiba

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