Heroes 3 issues under XP or Vista.

A serious problem with launching TCP/IP and other network games in Vista x64.
In SoD, the following error appears:
DirectPlay Error:
'Unknown error?'
File: 'C:\hero3.prj\Source_Code\Game\Remote.cpp'
Line# 1867

in AB:
DirectPlay Error:
'Unknown error?'
File: 'D:\Localozation\ARMAGEDDON\H3x1-v21_Source_Code\game\Remote.cpp'
Line# 1867

I tried compatibility mode and installed patch 3.2.