http://bugs.winehq.org/show_bug.cgi?id=11811
--- Comment #7 from Juan Lang juan_lang@yahoo.com 2008-03-03 14:10:41 --- This is probably due to how the app is enumerating the COM ports. On the hunch that it's using setupapi, could you try the workaround in bug 9902? Here's the .reg file to import from that bug: http://bugs.winehq.org/attachment.cgi?id=10210
You could also attach a +setupapi trace to confirm the hunch.