Search in Knowledge base module not working: why?

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Hi there,

I have a problem with the search function in the knowledge base module. It seems that it does not work properly. Some words return records properly but other words don't.

For example:
I have one record that is called "known arena issues"
If I search on known it gives no records
If I search on arena it gives the records that contain "arena"
If I search on issues it gives no records.

All these words are present in the body, title, subject and tags.
I searched case sensitive and also with the % an * signs.
I searched in basic and in advanced search, but It does not seem to work.

What can be causing this issue? Or where should I start looking to find the cause?

Thanks a lot for the help in advance!


OS: Windows 2003 Server R2
Sugar: Version 5.5.2 Pro
Webserver: apache 2.0.59
PHP: Version 5.2.5
Mysql: version 5.0.45

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Anybody? Or do you think this is a bug?

Thanks!!