Relational connection to BW fails with error "Not a valid token"

Hi,

I am creating BW relational connection from IDT.

When I press "Test connection", it returns error message below.

"Not a valid logon token. (FWB 00003)"

I have already checked SM59 in BW side and created RFC destination

DF_JCO_<hostname> using function module RSDRI_DF_CONFIGURE.

Confirmed system and user information were correct.

Any idea what might be cause of this error and how I can fix it?

Regards,

Hideaki