Stored procedure support for PSQLODBC

Hi,

I am trying to execute a stored procedure query using SQLExecDirect of
psqlodbc driver.

The sample statement is below
{call public.SXRCXT18_GETDESC1( ?, ? )}

I am getting an error -

ERROR: public.sxrcxt18_getdesc1(unknown, unknown) is a procedure;
Error while executing the query SQLNativeErr = {3} SQLErrorText = {4}.
SQLEXEC Id1 error (SQLState = ERROR: public.sxrcxt18_getdesc1(unknown,
unknown) is a procedure;
Error while executing the query SQLNativeErr = {3} SQLErrorText = {4}

Can you please tell me the reason for this? Is there a different way
to call stored procedure ?

Regards,

Abhishek Kumar