DataAdapter not being populated using LIKE in select

I am using Framwork 1.1, C#, and Access 2000.

My table is called "sample1".If has only 1 column
called "firstname" in it.

There are 3 rows in "firstname":

this is a dog
I have no doggies
there are only cats here

Now, if I use the following select:

SELECT sample1.firstname FROM Sample1 where firstname
like '*dog*'

2 rows returned.

If I use the following :

OleDbCommand SelCmd = new OleDbCommand("SELECT
sample1.firstname FROM Sample1 where firstname
like '*dog*'",MyConn );

OleDbDataAdapter DAx = new OleDbDataAdapter();
DAx.SelectCommand = SelCmd;
DAx.Fill( ds, "sample1" );

Zero rows are returned and no exceptions are thrown. Is
there a problem i can't see in the parsing the provider
is doing or do I need to change the syntax?

Help! - thanks in advance.