Originally Posted by stickyfingerz

No something is configed wrong in iis. Or mysql. I run 80 sites and probably 95 databases on a windows box and have never had that happen. iirc there is a setting in IIs that concern similtanious connections.

Ok It could be this.

Go into iis and right click on websites. Goto properties, and under performance make sure website connetions is set to unlimited.