It didn't work

when I do a step by step to see what hangs it runs the config.sys file and the line for himem.sys. it gets an error after that line. that goes a little something like this. error: unable to control a20 line!
xms driver not installed. then of course the next halt is when it says win95 missing himem.sys. this is a digital 3010 computer 300 Mhz pentium II by the way.

thanks if you can help more.

matt