Hi, my search doesn't seem to work. I get the following message...

Sorry, your search query is not formed correctly, we were unable to complete your search.

Ihave tried re-building the search which seems to momentarily make it work, but soon after it's doing the same thing. I've checked permissions on the index folder and they look okay / files get added after rebuild.

The log seems to show a few of these underneath my search term. 

Lucene.Net.Search.BooleanQuery+TooManyClauses: maxClauseCount is set to 1024
   at Lucene.Net.Search.BooleanQuery.Add(BooleanClause clause)
   at Lucene.Net.Search.RangeQuery.Rewrite(IndexReader reader)
   at Lucene.Net.Search.BooleanQuery.Rewrite(IndexReader reader)
   at Lucene.Net.Search.IndexSearcher.Rewrite(Query original)
   at Lucene.Net.Search.Query.Weight(Searcher searcher)
   at Lucene.Net.Search.Searcher.Search(Query query, Filter filter)
   at mojoPortal.Business.WebHelpers.IndexHelper.Search(Int32 siteId, Boolean isAdmin, List`1 userRoles, Guid featureGuid, String queryText, Boolean highlightResults, Int32 highlightedFragmentSize, Int32 pageNumber, Int32 pageSize, Int32 maxClauseCount, Int32& totalHits, Boolean& invalidQuery)