G5 cannot connect to update, itunes store, and RSS feed.

[Pattsro]

I first noticed little error signs next to my RSS feeds the day after my mail showed 500 messages being downloaded although none appeared (I average 3 mailings a day of email). Since then I get an error message when trying to get updates or accessing the itunes store. My mini mac has no problems of this sort although on the same wireless connection. I am frustrated by the inability to get updates since I can use the other itunes account on my mini.

[ElDiabloConCaca]

Can you access the internet via web browser?

Could a firewall somewhere in your setup be blocking access?

[Pattsro]

Yes, I can access the internet. I will look to see if there is a firewall problem next. Thank you for your response.