Wireless Network Hiccup

I'm currently using an MN-720 Wireless Notebook adapter
and an MN-700 Wireless Base Station. The connection
worked just fine for a long time, but recently, I have
begun to have intermittent connectivity problems.

Basically, the notebook has a hard time connecting to the
first page that I attempt to open up. It takes about a
full minute to find and load the page. Then, I can
connect to several pages in a row very quickly, but after
about a minute or two, it has trouble connecting again.
At that time, IE typically says it cannot display the
page. Then, I hit "refresh" and it loads instantly, and
continues working fine for another couple of minutes.
Then I run into the same problem again.

Now, I also have a desktop connected to the wireless hub
via a direct ethernet cable connection. I never have any
connectivity problems with the desktop. I have no other
computers hooked up to the network.

Also, I've recently used my laptop with the MN-720 on
another network and experienced the same problem, so it
must be something with the MN-720 adapter setup or
hardware.

Anyone have any advice as to what I can do to fix the
wireless connectivity problem? Thanks.

Chris