VB.NET and Interbase problems

Im doing a project in VB.NET using an INTERBASE database..

I'm able to show the info in the DB using the following code :

Dim cN As New ADODB.Connection()
Dim rS As New ADODB.Recordset()

cN.ConnectionString = "provider=LCPI.IBProvider;data source=localhost:" & _
"C:\DINEM.gdb;ctype=" & _
"win1251;user id=SYSDBA;password=masterkey"

cN.Open()

rS.ActiveConnection = cN

cN.BeginTrans()

rS.Open("SELECT * FROM CUSTOMERS", cN, ADODB.CursorTypeEnum.adOpenDynamic, ADODB.LockTypeEnum.adLockOptimistic)
rS.MoveFirst()



My problem is when I try to update, delete or add - I get the following error message :

Additional information: Current Recordset does not support updating. This may be a limitation of the provider, or of the selected locktype.

I have changed the locktype to pessimistic (and the other options) - still no go...

Any help will be appreciated!

BTW the provider I use (IBProvider) is freeware - the commercial one is $150... I looked in the help/readme but couldnt find anything that states the with the Free version you cannot update/add/delete... Maybe thats the problem???

Sounds like a question for Interbase and the Interbase db driver folks.