good morning boy and girls

i have a mainboard with 4 usb-conections but only one EHCI-controler. means, it is only one usb2-device supported. problem is that i have a WIFI-reciever and a USB-HD wich i conect to teh usb-ports. now, what happens on boot is that the WIFI-device conects to the EHCI-controler and my HD only conects to OHCI. since my internet is only 10Mbit fast and USB1 supports 12Mbit i would like to force the wifi-reciever to conect with USB1. i hope that peolple can understand the problem. is there any solution?

Thanks