Visual Basic RFC SAP no-unicode. Latin2 Caracteres are converted in '#'

Hi,
I are inserting data in Z SAP tables from a Visual Basic Script.
I are doing a RFC call.
The problem is that the data type text aren´t iserting correct when its are Latin2 caracteres.
Example:
Text in Visual Basic: "Prevozni strou0161ki-železniu0161ki"
But when theRFC function inserts the data in SAP, SAP shows "Prevozni stro#ki-#elezni#ki".
Could somebody help me??
thanks in adavanced,
Javi

Thanks for your answer.
But i din´t solve the problem.
I changed the encoding to UTF-16 and ISO-8859-5 but the caracteres are inserting bad yet :(.
I'm debugging the visual basic code and I can see that the text is correct in Visual Basic, but after it is incorrect in SAP.
Too, I'm inserting the value directly in visual basic sourcecode:
T_BAPI_P.Value(index, "TXZ01") = "Prevozni strou0161ki-železniu0161ki NOVO"
But the result is the same.
SAP shows "Prevozni stro#ki-#elezni#ki NOVO".
I have seen that in the transaction SM59 you can specify if the RFC conexion will be UNICODE.
The SAP system that i am working isn´t unicode, then it can not the tag to especificate this in SM59.
Could it be the problem that the SAP system isn´t unicode??
sorry, for my English's low level.
Thanks in advanaced for all yousr answer!
Javi

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