ms sql7: no records inserted

Hi.
i connect to a mq sql server v7 with a tTable object and i'm able to read
all records in the table.
if i try to insert some records
(while some data
begin
  mytable.insert;
 ..., ...,
myTable.post;
end;)
 , i see the sql-hourglass. but when the task finished and i exit my
program, the records are not added. (i check the table with ms-access)
whats wrong?