ODBC: SQL_ATTR_CONCURRENCY changing after simple select

The following is the log from an ODBC Test session against a SQL Server 2000 database.
MDAC Ver. 2.7 [SP1 I think].

The point of interest is that the SQL_ATTR_CONCURRENCY setting is changing from SQL_CONCUR_LOCK (READ/WRITE), to SQL_CONCUR_READ_ONLY after the SQLExecDirect() call [I've also tried SQLPrepare/SQLExecute with the same result].

Can anyone please throw some light onto why this happens, and how to avoid it? [It kills my SQLBulkOperations() call to insert values into the table]

Many thanks.
PeterC.

dbc: szSqlState = "01000", *pfNativeError = 5701, *pcbErrorMsg = 84, *ColumnNumber = -1, *RowNumber = -1
MessageText = "[Microsoft][ODBC SQL Server Driver][SQL Server]Changed database context to 'pctest'."
dbc: szSqlState = "01000", *pfNativeError = 5703, *pcbErrorMsg = 86, *ColumnNumber = -1, *RowNumber = -1
MessageText = "[Microsoft][ODBC SQL Server Driver][SQL Server]Changed language setting to us_english."

Full Connect:

Full Connect(Use Driver)
Env. Attr. SQL_ATTR_ODBC_VERSION set to SQL_OV_ODBC3

Successfully connected to DSN 'Testpc'.

SQLSetStmtAttr:
In: StatementHandle = 0x00841978,
Attribute = SQL_ATTR_CONCURRENCY=7,
ValuePtr = SQL_CONCUR_LOCK=2,
StringLength = SQL_NTS=-3,
fAttribute Type = SQL_C_SLONG=-16
Return: SQL_SUCCESS=0

SQLSetStmtAttr:
In: StatementHandle = 0x00841978,
Attribute = SQL_ATTR_CURSOR_TYPE=6,
ValuePtr = SQL_CURSOR_KEYSET_DRIVEN=1,
StringLength = SQL_NTS=-3,
fAttribute Type = SQL_C_SLONG=-16
Return: SQL_SUCCESS=0

SQLSetStmtAttr:
In: StatementHandle = 0x00841978,
Attribute = SQL_ATTR_ROW_ARRAY_SIZE=27,
ValuePtr = 1,
StringLength = SQL_NTS=-3,
fAttribute Type = SQL_C_SLONG=-16
Return: SQL_SUCCESS=0

SQLExecDirect:
In: Statementhandle = 0x00841978,
StatementText = "select * from pc02",
Statementlength = 20
Return: SQL_SUCCESS_WITH_INFO=1

SQLGetStmtAttr:
In: StatementHandle = 0x00841978,
Attribute = SQL_ATTR_CONCURRENCY=7,
ValuePtr = 0x0014C3F8,
BufferLength = 300,
StringLengthPtr = 0x0014E968,
fAttribute Type = SQL_C_SLONG=-16
Return: SQL_SUCCESS=0
Out:
*ValuePtr = SQL_CONCUR_READ_ONLY = 1,
*StringLengthPtr = 4I should also add that the cursor is changing from SQL_CURSOR_KEYSET_DRIVEN to SQL_CURSOR_STATIC.

PeterC.