Well,first of all,thank you all for all the help
1.The distance is irrelevant.I can sit as close as 1 meter and it still wont't work
2.I have a broadband connection from RDS RCS company,in ROmania.With username and password,on PPPoE connection.When i set up my router i have to input the username and password,yes.
I connect the internet cable,the white one which supplies the internet connection,to my router,and then i get a yellow cable which connects the route and the PC together.I don't have a modem
3.When it doesnt work,I can use opera mini on my cellphone to get to the router's gateawy,so it works.
4.I wish i could find the reset button,it is burried deep in the router.I need a sharp needle to press it.
5.I'll try to change the chanells
6.I also tried the DNS thing,it didnt quite work