Major on-line problems

I've had major problems getting on-line for the past month, which is why there haven't been any posts lately
My ISP couldn't workout what was going on (even after they sent me a new modem) and my local computer Guru was stumped. We even reloaded the Vista operating system and the telephone technician checked the phone line but nothing made any difference - the computer just wouldn't go on-line.
In the end, I replaced the ADSL microfilter and the new modem worked!!!!!
It seems likely that an electrical surge, possibly caused by lightning damaged the filter and the modem.
Great to be back but it seems incredible that it took more than four weeks to solve the problem.
Now I just have to figure out how to connect my wireless network as my oldmodem had four ethernet ports and the new one sent to me by DCSI only has one.