Heidi SQL 126.96.36.19969 (32 Bit) on Slackware 4.2 64 bit 4.4.38 kernel
It seems something was changed in wine 2.6 and 2.7, as with both of those versions I get an OLE error when trying to access a MSSQL database via tcp/ip. This works just fine in Wine 2.5. I'm going to file a Wine bug report, but thought I would mention it here.
See attachment for error message.
MySql seems to work just fine with wine 2.6 and 2.7.