Programmatically dropping and creating table

I am running Postgresql 7.2 and programmatically trying to drop a table
called vm_config and then recreate it from java. The drop seems to work, but
when I try to recreate the table I get a SQL exception saying "ERROR: cannot
create vm_config: file exists". If I do a commit after the drop and then do
the create I get the SQL Exception "ERROR: cannot create vm_config_pkey:
file exists". What am I doing wrong?

Chris White