wireless conection

> Prior to loading XP Prof., I was able to establish a
> wireless connection between my desktop and laptop. After
> XP-Pro was installed the wireless connection was loss.
> The connection is reported as unavailable. Also, the drop
> down box is not highlighted so I can't enter the type of
> wireless connection. Finally, the "Wireless" Tab now
> reads "Authentication"
>
> My LT is a Inspiron 5100 with a intergrated wireless
> card. I have had it for one week. The original Op Sys
> was XP-Home.
>
> What suggestion do you have?