Share BSNL Broadband Home Unlimited 750 plan?

[ashnu_tnj]

I am under Bsnl home UL750 plan.They provided a modem with 4 ethernet ports and 1 usb port( smartAX MT841 ).I have two computers that i use to connect to the modem port1 and port2.i am able to connect to internet from each computer separately.But when one computer is connected to internet and i connect my other computer it says user name and password is wrong(i.e, the un and pass is currently being used).how can i connect to internet from both computers simultaneously?is there any procedure for it?

[icebags]

cyheck this :

http://www.calcuttatelephones.com/da...tall/menu.html

[ashnu_tnj]

Thank You..Helped a lot...