Inserts hang in DB and error messages in log

Hi,

We're working with version 8.3.5-1.

Lately we started seeing insert statements hang in the DB. The
statements come from two different clients.

When it happens, I see the following messages in the log every second or
so:

2009-05-21 08:56:49 IDT ERROR: permission denied to set parameter
"log_statement"

2009-05-21 08:56:49 IDT STATEMENT: SET log_statement='none';

2009-05-21 08:56:50 IDT ERROR: permission denied to set parameter
"log_statement"

2009-05-21 08:56:50 IDT STATEMENT: SET log_statement='none';

2009-05-21 08:56:51 IDT ERROR: permission denied to set parameter
"log_statement"

2009-05-21 08:56:51 IDT STATEMENT: SET log_statement='none';

2009-05-21 08:56:52 IDT ERROR: permission denied to set parameter
"log_statement"

2009-05-21 08:56:52 IDT STATEMENT: SET log_statement='none';

2009-05-21 08:56:53 IDT ERROR: permission denied to set parameter
"log_statement"

2009-05-21 08:56:53 IDT STATEMENT: SET log_statement='none';

2009-05-21 08:56:54 IDT ERROR: permission denied to set parameter
"log_statement"

2009-05-21 08:56:54 IDT STATEMENT: SET log_statement='none';

2009-05-21 08:56:55 IDT ERROR: permission denied to set parameter
"log_statement"

2009-05-21 08:56:55 IDT STATEMENT: SET log_statement='none';

Any help (or guidelines for additional required information) is
appreciated.

Thanks,

Moshe.

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