insertion by LINQ

hi,
iam Munwar, iam facing problem in my code, i want insert data in a table using LINQ but the attributes of table does not appears in cod..
eg.
customer_table c = new customer_table
{
 .. here fields of table does not appears automatically...
};
but when iam using other table name it works..
please help me.
Thanks:
Regrds:
Munwar