Error when connecting to pass protected db

[vma]

Hi all,
I'm tring to connect to a password protected microsoft access mdb file and I get an error about "Could not find installable ISAM"
The connection string is like this:

OleDbConnection aConnection = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;" + 
				"User Id=admin;Password:xxx;Jet OLEDB:Engine Type=5;Persist Security Info=True;" +
				"Data Source=C:\\Documents and Settings\\Mihai\\Desktop\\Imobiliare\\Vita\\BD\\anunturi.mdb");

The thig is that if I try to open a mdb file that has no password and I remove the part about User Id and Password from the conn string it works.
Can someone help me out?
Thank you!