SVN - Apache Service stops often

We are using SVN 1.5.5 from Collabnet svn binaries that included apache 2.2.
Subversion is accessed through apache. (http://)

The problem is apache service gets stopped often. When I look at the logs, I
see the following message. Its working fine for a week or two and then
apache service goes down.

Please let me know what is going wrong.

Error msg from httpd logs -

[error] (OS 6)The handle is invalid. : Child 5656: Encountered too many
errors accepting client connections. Possible causes: Unknown. Try using the
Win32DisableAcceptEx directive.
[b][error] (OS 6)The handle is invalid. : Child 5656: Encountered too many
errors accepting client connections. Possible causes: Unknown. Try using the
Win32DisableAcceptEx directive.[/b]
[error] (OS 6)The handle is invalid. : Child 5656: Encountered too many
errors accepting client connections. Possible causes: Unknown. Try using the
Win32DisableAcceptEx directive.
[notice] Child 5656: Exit event signaled. Child process is ending.
[notice] Parent: Received shutdown signal -- Shutting down the server.
[notice] Child 5656: Released the start mutex
[notice] Child 5656: All worker threads have exited.
[notice] Child 5656: Child process is exiting
[notice] Parent: Child process exited successfully.

Thanks in advance

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