MySQL priveleges

Hi All, for some reason i cannot Create tables in my database anymore.
I have a valid user that has the relevant permissions. But when i try
to create a user i get an error saying "failed to create table for user
'@'localhost". It seems that MySQL is not Creating the table as the
appropriate user. Any idea how to get MySQL to use the appropriate
user? The server sometimes gives an error saying that i need to "Flush
priveleges"
Thanks Wes