ERROR Help "Serial Port Already in Use) Try to use Amiga Serial Flatbed Scanner Sharp Jx100

Hey guys just like the title says I hooked up my cool Sharp JX100 flatbed scanner from my Classic Amiga to my peg2 running Amiga os4.1 u 6. The scanner is connected to the 9pin serial port but none of the software (the amiga jx100 software and Image fx 4.5 w/ jx100 plugin) will work with it becuase I get an Error saying "Serial Port already in use" Is this because of serial port dumping debug info? How do I fix this?

Also the OS4 serial prefs only lets me select max speed of 31250? whats up with that? Even my classic amiga can go higher! Please help

well answered one of my own questions.. i looked in devs and saw that there is no serial.device but pegserial.device. changed that in image fx 4.5 studio and confirmed IT WORKS! YAY its slow as hell though becuase of the serial speed so the question still remains how can i boost the serial driver speed? Why would os4 have such a low baud limit?