Hi,
If you are using .Net protocol script, System.Data.OracleClient is included in ADO.Net filter. Most probably you will need to record your application again after setting the correct filters.
You can also review: http://h30499.www3.hp.com/t5/LoadRunner-Support-Customer/LR-Support-Tip-VuGen-NET-Protocol-Recording-Best-Practices-and/td-p/6364297
Kind regards,