Hello Ben,
It is very unlikely that NASLite is loading the incorrect driver. I'm willing to bet that if NASLite loads the Intel driver then that's the NIC you have in in your server. In fact, if you do a little research on your hardware you'll find that IBM requires some hardware (BIOS) modifications in order to prep an IBM x306 for use with linux. Take a look here:
http://publib.boulder.ibm.com/infocente ... es_306.htmThe steady green light on your NIC can be caused by a host of reasons such as bad cabling, bad NIC, improper BIOS settings, etc. It will be helpful if the hardware is tested and working prior to assuming an OS issue?
Hope the above is helpful.