No upgrade from previous versions.

Fresh install with 10.1 SP1
on Novell SuSE Linux Enterprise Server 10.
Windows workstations.

Few things that are happening.

1) ZCM gets really slow, and to a point where page cannot be displayed. The server seems OK. This usually happens every week or so.We reboot and everything is fine. Could someone steer me to a log file that might give me a clue?

2) System Updates won't download. Says there is no server for downloads. I can use a browser on that server, and get out to the Internet fine. Is there something blocking ZCM from getting out?

3) Email notifications are being sent. I configured the SMTP settings, looks like it should work. Guessing this might be related to the Internet thing.

Any help or suggestions would be appreciated.

Thank you in advance.