Wifi problems with 3.0

I just recently updated my 3g iPhone to the 3.0 firmware. I was testing out a couple of apps that use wifi, remote and wifi track(I think it is called wifi track). The remote app ,I downloaded the latest 3.0 compatible version, from the AppStore. When I went to use remote, I created an ad hoc network on my laptop, it worked for a little while but then the app stopped controlling iTunes and said I needed to be on wifi. The wifi track app when I opened it gave me an error message saying: unable to initialize wifi scanner. I am just wondering if there is something wrong with either the apps or the wifi on my phone. Also wondering if anyone else had a similar problem, or if anyone could help me fix my problem?

 

Ok, just got back from the library where they have wifi and my wifi on my phone worked. I was able to connect and stay connected. I just got home and created an ad hoc network on my laptop and when I went into settings on my phone my wifi disconnected a couple of times. I reset my network settings and when my iPhone restarted I went into settings connected to my ad hoc network and my wifi disconnected again. I am using a MacBook pro laptop, one thing is a couple of days ago I ran some updates on my laptop, I am pretty sure airport was one of the updates. Also wifiTrak came out with an update for 3.0 so I am going to test that app again.