access uses myodbc with 'admin' user

I trying the following small test but it won't work with the correct user:

In Access a table is linked with the database on a mysql server using
the myodbc driver. The connection description in access is:
"ODBC;DATABASE=test;DESCRIPTION=loginAsMiguel;DSN= _myodbc_test2;OPTION=526340;PORT=0;SERVER=linux;UI D=miguel;TABLE=tabel1"


A linux (SuSE v9.0) is running MySql (v4.0.15) with some log files.
My WinXP is running the MySqlAdministrator (v1.0.19).
(I made a small database test.table1 on the mysql.)
The myodbc driver v3.51 is working well. Pressing the 'Test' button of
the driver, I can see in MySqlAdministrator that user 'miguel' has
logged in on the mysql database.


But Access is always connecting as user 'Admin'.
I tried to modify the table description by adding 'UID=miguel' but it
still logging in as 'Admin'.
What do I do wrong ?

The server log file shows also:
"Connect Admin@mywinxp as anonymous on test"

Using mysql as root, it says:
"
mysql> select host, user from mysql.user;
+---------------------+--------+
| host | user |
+---------------------+--------+
| | |
| | miguel |
| 192.168.% | root |
| localhost | |
| localhost | miguel |
| localhost | root |
| linux | |
| linux | miguel |
| linux | root |
| mywinxp | miguel |
| mywinxp | root |
+---------------------+--------+
11 rows in set (0.00 sec)
"

Thanks,
Miguel