Reading text fields from SQL server

I have been trying to query from SQL server using JDBC driver. So far I have successfully managed to query data from  integer columns of my server but no success getting the data from fields with text (nvchar). I have tried both database reader and database connection reader nodes but same results have been achieved so far.

Everytime the query is executed for the text fields I recieve an error "Operation not yet supported"

I would appriciate if anyone can shed a light on my problem

This might indicate a problem with an older SQL Server driver, any chance to update it, what version are you using?