"Invalid Pointer Operation" while reading tuples

Hello,

I'm receiving an error message "Invalid pointer operation" when I'm reading data
from my database.
I'm using PostGreSQL 8.2.5 with Windows 2003 Server Enterprise Edition.
When I saw the psqlodbc log I found teh messages below:

[11.281]CONN ERROR: func=PGAPI_SetConnectOption, desc='', errnum=206,
errmsg='Illegal parameter value for SQL_TXN_ISOLATION'

[0.250]STATEMENT ERROR: func=set_statement_option, desc='', errnum=30,
errmsg='The option may be for MS SQL Server(Set)'

Some parts of the log:

[11.281]conn=02FB5D98, query='COMMIT'
[11.281]CONN ERROR: func=PGAPI_SetConnectOption, desc='', errnum=206,
errmsg='Illegal parameter value for SQL_TXN_ISOLATION'
[11.281] ------------------------------------------------------------
[11.281] henv=02FB2F58, conn=02FB5D98, status=1, num_stmts=16
[11.281] sock=02FA3178, stmts=02DEBD38, lobj_type=17288
[11.281] ---------------- Socket Info -------------------------------
[11.281] socket=724, reverse=0, errornumber=0, errormsg='(NULL)'
[11.281] buffer_in=48140048, buffer_out=48153296
[11.281] buffer_filled_in=18, buffer_filled_out=0, buffer_read_in=18

[0.250]conn=02DE3A70, query='close "SQL_CUR02FA8CA8"'
[0.250]conn=02DE3A70, query='RELEASE _per_query_svp_'
[0.250]conn=02DE3A70, query='close "SQL_CUR02DE85C8"'
[0.250]conn=02DE3A70, query='RELEASE _per_query_svp_'
[0.250]conn=02DE3A70, query='COMMIT'
[0.250]STATEMENT ERROR: func=set_statement_option, desc='', errnum=30,
errmsg='The option may be for MS SQL Server(Set)'
[0.250]
------------------------------------------------------------
[0.250] hdbc=02DE3A70, stmt=02DEABE8, result=00000000
[0.250] prepare=0, internal=0
[0.250] bindings=00000000, bindings_allocated=0
[0.250] parameters=00000000, parameters_allocated=0
[0.250] statement_type=-2, statement='(NULL)'
[0.250] stmt_with_params='(NULL)'
[0.250] data_at_exec=-1, current_exec_param=-1, put_data=0
[0.250] currTuple=-1, current_col=-1, lobj_fd=-1
[0.250] maxRows=0, rowset_size=1, keyset_size=0, cursor_type=0,
scroll_concurrency=1
[0.250] cursor_name=''
[0.250] ----------------QResult Info
-------------------------------
[0.250]CONN ERROR: func=set_statement_option, desc='', errnum=0, errmsg='(NULL)'

Can you help me?

Thanks,
Cláudia.