WiFi can bother people since it doesn't work as far away as they said or through walls too well.
Move the units closer together.
I have had lots of problems with connecting to the net from my laptop using my home network - I have XP professional on my laptop and my other home computer - after consideralbe teething problems my computer guy eventually got the networking to work but have only been able to get on net twice and not at all for over a week now - I am ok with basic and slightly more advanced stuff but no expert - has anyone else had or resolved similar problems?

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