Retrieve Data From A SAP Function

[pator]

Folks
Has anyone got any examples on how to retrieve data from a SAP function. I'm using Crystal Reports 10. I can see the SAP function OK in report design and have passed the parameters in the record selection formula.

My record selection formula
{RFC_READ_TEXT.T_TEXT_LINES.MANDT} = "020" and
{RFC_READ_TEXT.T_TEXT_LINES.TDOBJECT} = "TEXT" and
{RFC_READ_TEXT.T_TEXT_LINES.TDNAME} = "CRYSTAL" and
{RFC_READ_TEXT.T_TEXT_LINES.TDID} = "ST" and
{RFC_READ_TEXT.T_TEXT_LINES.TDSPRAS} = "EN"

If I run this function in SAP using these parameters I get the data returned ,But no data is returned in CR10, I get no errors. It tells me no records are read.
Am I missing something ?
Regards & Thanks
Pator