Bridge 1310 wire connection problem?

We have implemented new cisco 1310 bridges (2 root bridge/13 non-root bridge). And connectivity and reachability between bridges is OK, but the issue that
1.when you try to access the root bridge it is hang for some time especially when you access through web interface,and when you access by web you lose connection (drop packets ping).
2. when you try to create browse through web, the bridge go hang again.
-Already I've upgraded all bridges image to "c1310-k9w7-tar.123-7.JA5", and problem was resolved for some time but now it is again appears.
3. when you try to connect to non-root bridge is smothly acceable and no connection issues, and already end users are working fine.
Anyone experinced such an issue or can help on figure out??

How long are the cables?  Maybe they have bad connections now.  Replace them.

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