Problem with oracle transaction

Hello,

I have an SP, which is calling from .NET code using ODP.

In that SP i have few update table statement followed by Insert
statement and then delete statement.

When I am executing its not updating the table. means the code flows
are:

Update <statement>
Update <statement>
Update <statement>
Insert <statement>
Commit
Delete <statement>
Commit

In this scenario, update statements are not working. do i need to put
commit after every update statement.

Cheers,
Prasanta