Update Data in mdb Table

I'm still working at my first database / time tracking solution.

Right now I can create a new user and a table with the Name of the user and the columns

[ID] AUTOINCREMENT NOT NULL PRIMARY KEY, 
[Datum] Text, 
[Beginn] Text, 
[Ende] Text, 
[Pause] Text, 
[Arbeitszeit] Text

For the next step I inserted new data into the table by using:

command.CommandText = "insert into " + user + " (Date, Begin, End, Pause, Worktime) values ('" + dateTimePicker1.Text + "', '" + Begin + "', '" + End + "', '" + Pause + "', '"+ Worktime+"')";

Begin, End, Pause and Worktime were declared beforehand as strings. That works perfectly fine so far.

But now I'm trying to update/Change the values of the inserted Data and it's not really working.

I'm using the following code right now:

OleDbCommand command = new OleDbCommand();
OleDbCommand cmd = new OleDbCommand();

cmd.Parameters.AddWithValue("@Date", Date);
cmd.Parameters.AddWithValue("@Begin", Begin);
cmd.Parameters.AddWithValue("@End", End);
cmd.Parameters.AddWithValue("@Pause", Pause);
cmd.Parameters.AddWithValue("@Worktime", Worktime);
cmd.Parameters.AddWithValue("@ID", ID);

command.Connection = con;
command.CommandText = "update" + user + " set [Date] =@Date [Text], [Begin] =@Begin [Text], [End] =@End [Text], [Pause] =@Pause [Text], [Worktime] =@Worktime [Text] where ID = @ID;";

con.Open();
command.ExecuteNonQuery();
con.Close();

The error I am getting is:

System.Data.OleDb.OleDbException (0x80040E14) illegal SQL-Instruction; 'DELETE', 'INSERT', 'SELECT', 'PROCEDURE' or 'UPDATE' expected.

The error occurs on the line

command.ExecuteNonQuery();

If anyone could help me with this I'd be really glad.

missing blank space after update , change to this :

command.CommandText = "update " + user + " set [Date] =@Date [Text], [Begin] =@Begin [Text], [End] =@End [Text], [Pause] =@Pause [Text], [Worktime] =@Worktime [Text] where ID = @ID;";