My USB ports won't work with iPhone/iPod?

I just got an iPhone 4s 3 days ago. I had all of my contacts transferred from my old phone, but when I connected it to my computer to transfer my music/apps from my iPod touch, they all got deleted. Everything else was transferred however. I performed the necessary iTunes update etc. But I don't understand why my contacts were erased. My phone also will not connect to my home Wi-Fi, but it will to all of the other wireless routers I have tried. I only included those two bits in case they might be of help to my real problem (I can fix the other two I think), which is the fact that I tried to connect my phone to my computer today, and it won't even charge, let alone be recognized by iTunes. I tried to connect my iPod as well, no luck with that either. They both connect to other computers and the wall. My computer's USB ports have no problems when I plug a wireless mouse, printer, and jump drive into it. Can someone please tell me why my computer is behaving this way with only my iPhone/iPod?

Do a copy, then erase the files later rather than a cut.

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