SmartDevice

I am trying to acsses my SQL server ce front end as vb.net2005 and backend as compact edition 2005
i am getting the following error:

sqlce was unhandled
the path is not valid .check the directory for the database [path=data source=Test.sdf;persist Security Info=false;
My code is
con=new sql ce connection("Data source=Test.sdf; Persist Security Info=False")
con.open()
cmd=New sql ce command (" insert into tablename values ('"+textbox1.text+"',,"+textbox2.text+"')",con)
con.close
Advance thanks ,
I am waiting for your reply.