Hello, my laptop which is a toshiba has a pluscom wifi connector usb style and it connects fine for about 5 minutes then disconnects!
i then have to take it out and put it back in the establish a connection again which then works for a following 5 minutes prompting the same process!
I edited out your e-mail addy, as it is never a good idea to post your e-mail addy onto any forum due to for the potential of spamming, malware, etc...
In regard to your question, have you tried a different USB port with it (if any are available)? If not, give that a shot. If that doesn't work, your best bet would be to download the latest driver for the device (pluscom) via their support site.