Help please?

First time poster, here.

I bought my Acer Aspire One in June of 2009, and it's always had problems connecting to just one type of connection: it's a hidden connection at my work, it works for everyone else, and my Acer connects to any other wireless just fine, however, it always disconnects after exactly 15 minutes. I've updated the drivers, turned off power-save mode, and it still does it.

I'm not sure if this is a double-post, as this is my first time here, but if anyone could get back to me on this it would be much appreciated!

~Novak