ibase_query("EXECUTE PROCEDURE [procedure name]") return error ?

[marconi8]

when i call ibase stored procedure which will return to me some vars all is ok

ibase_query("SELECT * FROM STORED PROCEDURE NAME ");

but when my stored procedure doesnt return any valuesi use this string

ibase_query("EXECUTE PROCEDURE [PROCEDURE NAME]");

andi get the error, why, error is like ibase_error: message length error

what this mean,

thanks for helping