tenchu

Well this is my first post in this forum Basically ive had opflash for months now and just recently got a second copy for two players  My setup is two pc's win XP on both connected straight using X-over cat 5e cable and playing multiplayers work brilliant (Especially playing operation lojack) but trying to get voice com to work has been difficult  the machine that connects (client) to the game has working voice com but the machine that works as server doesn't  is this impossible, some kind of limitation??? can it be done??? have i missed something simple???  Any way thanks for any help...... Ps Opflash2.....  yippee