DataWindow Error - Database transaction information not available

Hi,

I am using Powerbuilder 12.5.

Hits error below, when try to open a window which contain a datawindow control with a graph in.

DataWindow Error -

Database transaction information not available.

Call SetTrans or SetTransObject function.

I have set settransobject as below:

dw_1.SetTransObject( SQLCA )

dw_1.Retrieve(dt1,dt2)

Fyi, i did put the following code after Retrieve() function above, it gives sql error code: Transaction not connected.

MessageBox( 'SQLcode...', 'SQL Code:  ' + SQLCA.SQLerrText )

And it is connected to MSSQL Server 2008 R2.

Please help.

Thank you.