Solr Negative query

[Viswa S]

Dear Solr/Lucene gurus,
I have run into a weird issue trying use a negative condition in my query.
Parser:StandardQueryParserMy Query: Field1:Val1 NOT Field2:Val2Resolved as: 
Field1:Val1 -Field2:Val2
The above query never returns any document, no matter how we use a paranthesis.
I did see some suggestions on LuceneQParser to use something like:*:* 
Field1:Val1 -Field2:Val2
This seems to return some documents, however it seems to ignore the first 
condition (Field1:Val1), Please help.
ThanksVis