On some systems, you will need to perform the following steps to make your rescue disk work: 

a) Open the CONFIG.SYS file on your Rescue Disk 
b) Find the line that contains "EMM386" 
c) Change that entire line to the following: DEVICE=A:\EMM386.EXE /FRAME=NONE /DPMI=OFF /INCLUDE=b000-f000 

Note that this solution should also work for EasyRecovery disks that won't boot initially.