Problems when searching a view in the web

Hello, I hope someones able to help!

I have a strange problem using the standard search of Lotus Notes/Domino.

The database is accessed with browsers (mainly IE) and contains a lot of documents.

When I try to search for a document using a number, which is in the document, I only get the message “No documents found”. Trying another number, the search is successfull, either when I try to search this way “3392*” I get results, but this document (and others) are not included in the resultset, although they match the search criteria.

E.g. search is “3392*”.

I get a lot of documents beginning with that number, but in the same column is a number 3392554, which is not shown in the results, but is definitively in the view.

The database has a FTI and I refreshed and rebuild it. The column containing this number is sorted.

What is interesting is, that if I search the same view using another keyword, e.g. the name of the document, the result contains this special document.

Has someone an idea what can be wrong?

Thank you for your help in advance.

Alexander