Could be a few things. Firewall AntiVirus Network settings If your ISP is saying is theres no issues it might have been working for you while you were on the phone with them, next time it happens try and log what time it happens. The more proof you provide to your ISP theres an issue the better chances of help from them. That being said. a Beaver Error is as Follows [quote]BEAVER errors are caused by a failure to connect your console to another player’s console via the internet. This can be caused by connection quality issues (such as packet loss, ISP saturation, or general internet congestion). It can even be caused by certain WiFi setups, faulty in-home wiring, or other issues that require on-site support or expert investigation. However, they are most commonly caused by router or network configuration issues. [/quote] This would mean your console is losing connection to the servers. it might be for a few moments but it is causing a issue. my advice would to hard wire in to your console with an Ethernet cable.