After installed IBDAC 2.50, my application doesn't work properly. I tested it and here is the result...
1. Set SQL as "SELECT SIRA, REPORTGROUP, REPORTCAPTION FROM MSREPORTS WHERE REPORTFORM = 'MAIN' ORDER BY REPORTGROUP"
2. Set Options.QueryRecCount to true
3. Set Active to true
... and get surprised

DDL of MSREPORTS
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CREATE TABLE msreports (
sira INTEGER NOT NULL,
reportname VARCHAR(100) NOT NULL,
reportgroup VARCHAR(100) NOT NULL,
reportcaption VARCHAR(100) NOT NULL,
reportform VARCHAR(100),
reporttype SMALLINT DEFAULT 0 NOT NULL,
reportsql BLOB SUB_TYPE 1 SEGMENT SIZE 80,
reportdesign BLOB SUB_TYPE 0 SEGMENT SIZE 80,
reportparams VARCHAR(100),
subefield VARCHAR(20),
yaziylafield VARCHAR(20),
xlstemplate BLOB SUB_TYPE 0 SEGMENT SIZE 80
);