I have changed the default IP address, and would like to change the range to avoid adding all the static assignments manually.  When i go to change the start range from 1 to 50, I get an error 
"DHCP end ip should be greater than the start ip".  Clearly it is, as the end ip is still 250.  I tried reversing the order (pretending the web page was wrong) and put int 250, then 50, and I could not connect back to the wireless to configure it without rebooting.  What am I doing wrong?