Unable to decipher ODBC trace log

Trying to use ODBC (windows) to connect to MySQL (Linux). The trace file
shows the following:

odbcad32        cec-dc8    ENTER SQLDriverConnectW
        HDBC                00A215E8
        HWND                00000000
        WCHAR *             0x74329A38 [      -3] "******\ 0"
        SWORD                       -3
        WCHAR *             0x74329A38
        SWORD                        2
        SWORD *             0x00000000
        UWORD                        0 <SQL_DRIVER_NOPROMPT>

odbcad32        cec-dc8    EXIT  SQLDriverConnectW  with return code -1
(SQL_ERROR)
        HDBC                00A215E8
        HWND                00000000
        WCHAR *             0x74329A38 [      -3] "******\ 0"
        SWORD                       -3
        WCHAR *             0x74329A38
        SWORD                        2
        SWORD *             0x00000000
        UWORD                        0 <SQL_DRIVER_NOPROMPT>

        DIAG [HYT00] [MySQL][ODBC 3.51 Driver]Access denied for user 'sac'@'
nnn.nnn.nnn' (using password: NO) (1045)


I have verified that the grants are setup properly (have tried a number of
variations as well), the Linux firewall is open, and all appropriate names
can be resolved. What does the odbc trace log tell me?

-- 
Charles Schultz