Error "Intenal Dotnet framework data provider error 30"

<font size="1"><p><font size="2">Hi,</font><p><font size="2">I am using PostGRESQL database for one of my
project.</font><p><fontsize="2">I used PGNP32-1.2.8-RC4 OLEDB provider for connecting my c#.net program to PostGRESQL
database.</font><p><fontsize="2">During the development, I have to change my table structure again and again just
becauseof the Error "Intenal Dotnet framework data provider error 30".</font><p><font size="2">First time i got this
errorwhen i try to fill data Adapter with Dataset. </font><p><font size="2">Second time i got this error when i try to
filla combo box with dataReader.</font><p><font size="2">After a lot of R&D ,I found that problem is with the
datatype.I have changed datatype of all the columns to "text" except the one which is primary key, it
WORKS.</font><p><fontsize="2">I don't want to compromise with the table structure, so anyone please reply where the
problemis......Is it the provider or with the approach.</font><p><font size="2">Please reply
urgent....!!!!!</font><p><fontsize="2"> </font><p><font size="2">Regards,</font><p><font size="2">Prabhat
Mishra</font></font>