Getting an error every time I try to ...

Every time I go to check available updates for my apps I get this:

Could not purchase "". The network connection timed out.
Make sure your network settings are correct, and your network connection is active, then try again.

After this happens, I am able to go to the downloads tab and on the bottom it now says '39 iTunes Downloads available'. I click this and I'm prompted with a pop up window that states:

Unable to check for available downloads. The network connection timed out. Make sure your network settings are correct and your networkconnection is active, then try again.

I don't understand because I have just been able to purchase, download and install iPod Touch 3.0 onto my 32GB iPod Touch 2nd Generation. I have installed iTunes 9.0 as well on my computer. I can access the iTunes store and browse. When I try to update my apps via my iPod Touch, it allows me to install. But! instead of it installing with it's progress bar, it says "waiting..." and renders the app not able to be used or deleted. In order to get rid of the "waiting..." on the app, I have to restore my iPod Touch and use to old versions of the apps. Which occassionally crash because I have the iPod Touch/iPhone 3.0 software. I forgot to mention that the internet works completely fine on my computer and safari on my iPod Touch. I need help!! it frustrating me to no end...

Thanks in advance!

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