error code 15 comm conflict

Just purchased well used modem card Practical Peripherals with dip switch on back.

Modem works OK. Might be doing something incorrectly, but as far as can tell, it seems like it will only work as com3. IRQ of 7 is same as LPT!. Can't seem to change info in order to used printer and modem at same time.

Does anyone know what the dip switch is for?

Thanks

 

for fixing the problem you have with it!

http://www.techadvice.com/support/practical-peripherals/jumpers.htm

 

Thanks for all your help.