usb card does not fit computers

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http://crunchbanglinux.org – I brought a LB-LINK 802.11 b/g/n 300 Mbps wireless USB adapter.  This card does not fit into the USB ofmy laptop or desktop.  It goes in about 4/5 of the way, and then, stop.  The merchant mailed me a 2ndUSB wireless card because he thoughted the 1st card was defective - same problem w/ 2nd card.[Personally, I don't think either card is defective.  Compatibility problem???]Is the problem because the USB connection differs or what?  Do I need an adapter?I have Intel USB controllers on my dinosaur desktop and eee laptop.http://shengchieh.50webs.com/Desktoplspci.txth (HowTos)