I need help with Tethering!

[Apota]

I would like to get internet access on my Thrive when there is no WiFi service available. I guess the best thing to do would be to use my phone as a WiFi hotspot, but I was told I can't do that without rooting my phone. So, I got, "PdaNet for Tablet" and installed it on my Motorola Droid A855 phone and my Toshiba Thrive Tablet. It works fine for browsing the internet and going to websites, but if I try to use an application that accesses the internet or try to watch a YouTube video, etc. it disconnects me from the internet. PdaNet for Tablet is connecting via Blutooth. Is there a way I can fix this problem, or is there a better way to connect my tablet to my phone without these kinds of issues? Thanks so much for all your help and time! ...Steve