Got this common problem PPP Password Invalid in your Wifi modem, well the solution for this is very simple.
Basically the problem here is that password in your modem and the password in your service providers servers are not matching and conflicting. So we have got to reset the modems and servers password.
Also, the thing to be noted is that the problem is at servers providers end ( provided that you haven't messed around with your modem ).
So just ring up your service providers...
