Fixed Binary[16] Index

[Stefan Von Torklus]

Hello,

I have a problem with the C++ ADK. I have a table with an FixedSized Binary[16] index-field.
I can put and get the data directly.
But I have problem to search for a specific Entry. Here is how my code looks like:

uchar dta[17] = {"1234567890123456"};

I_Field_Ptr pfUid = pT1->get_Field("uid"); //get the field -> successfull
I_Value_Ptr ptr = (pfUid->get_Value()->Clone()); //successfull
fbl_dynamic_cast<I_ValueBinary>(ptr)->put_Data(dta,16);  //successfull
REC_ID id = pfUid->FindSingleValue((I_Value_Ptr)ptr);  //successfull

BUT the ID returns always a 1 (But the value is e.g. on RecID 1000). 
(Also if there is no data within the table)

What I'm doing wrong?
Any suggestion are welcome! 
Greetz,
Stefan