When I Make Server Ppl Cant Join Me

I USE SHIRO MODEM USING PTCL ..........DSL 1MB CON ............WHEN I MAKE SERVER PPL CANT JOIN ME >..........any idea + One more thing i cant access SHiro modem setup website when i write 192.168.1.1 in my browser it doesnt open any thing please help

forward respective PORTS frm modem

unblock frm ur Firewall if any..