I use a installed copy of an original War-II-CD back from 1994. I think my settings in War II are correct (same baud rate etc.) Is there maybe some old dos game with multiplayer mode free to download, with which I could test if the same problem appears as in WAR II?

Additional info: Before the errors I get a warning: "Serial1: Warning: Tried to activate FIFO" Is this important? And after I shut down WarCraft II is says "Warning: file c:\war2\WAR2.INI exists and failed to open in write mode." But there is no write protection for this file. Maybe these warnings …

Yes, I did. On both PCs.

Hi. A few weeks ago I tested WarCraf II (original version from 1994) in multiplayer with DOSBox 0.73. At that time I ran Windows XP on both computers used. And, well, it worked... Now I installed Windows 7 on one computer and it doesn't work anymore. I can connect via serial1=nullmodem rxdelay:10000 …