Fulltext Match BOOLEAN MODE not searching integers

[Tompkins Neil]

Hi

I have the following fulltext search which appears to work fine for string
phrases.  However if I search like just "51" which is part of the string
name like 51 Blue Widget in the table it doesn't return any results.
However if I search like "bl" it returns the 51 Blue Widget result.  My
query is as follows :

SELECT  Name MATCH (Name) AGAINST ('51*') as Relevance
FROM Products
WHERE MATCH (Name) AGAINST ('51*' IN BOOLEAN MODE)
ORDER BY Relevance DESC

Any ideas what the problem might be ?

Thanks,
Neil